147 people were killed in the attack on Kenya's Garissa University College as armed assailants forced their way into the university and opened fire at students on April 2, 2015. The Al-Shabaab militant group has claimed responsibility. Image: A member of the security forces escorts a student out of a Kenyan University campus in Garissa on April 2, 2015. Pic/ AFP
147 people were killed in the attack on Kenya's Garissa University College as armed assailants forced their way into the university and opened fire at students on April 2, 2015. The Al-Shabaab militant group has claimed responsibility. Image: A member of the security forces escorts a student out of a Kenyan University campus in Garissa on April 2, 2015. Pic/ AFP
In the bloodiest terror attack in Pakistan in years, over 140 people, mostly children, were killed, on December 16, 2014, by heavily-armed Taliban suicide bombers who stormed the Army Public School on Warsak Road in Peshawar. Image: Bullet holes are seen in the wall at an army-run school a day after an attack by Taliban militants in Peshawar on December 17, 2014. Pic/ AFP
In the bloodiest terror attack in Pakistan in years, over 140 people, mostly children, were killed, on December 16, 2014, by heavily-armed Taliban suicide bombers who stormed the Army Public School on Warsak Road in Peshawar. Image: Bullet holes are seen in the wall at an army-run school a day after an attack by Taliban militants in Peshawar on December 17, 2014. Pic/ AFP
A suspected Boko Haram suicide bomber disguised in school uniform killed 47 students in northeast Nigeria, on November 10, 2014. The explosion ripped through an all-boys school in Potiskum just as students gathered for morning assembly before classes began, causing panic and chaos. Image: A civil society group carrying posters march on November 17, 2014 to protest the killing of students. Pic/ AFP
A suspected Boko Haram suicide bomber disguised in school uniform killed 47 students in northeast Nigeria, on November 10, 2014. The explosion ripped through an all-boys school in Potiskum just as students gathered for morning assembly before classes began, causing panic and chaos. Image: A civil society group carrying posters march on November 17, 2014 to protest the killing of students. Pic/ AFP
Thirteen people were killed after a gunman, identified as 29-year-old Farda Gadirov, opened fire at a university in the Azerbaijani capital Baku, on April 30, 2009. Image: Students leave the Azerbaijan State Oil Academy in Baku after the shooting. Pic/ AFP
Thirteen people were killed after a gunman, identified as 29-year-old Farda Gadirov, opened fire at a university in the Azerbaijani capital Baku, on April 30, 2009. Image: Students leave the Azerbaijan State Oil Academy in Baku after the shooting. Pic/ AFP
A 22-year-old hospitality management student Matti Juhani Saari opened fire on students at vocational high school in Kauhajoki, Western Finland, on September 23, 2008, killing ten people and injuring one before shooting himself. Image: A view of the area near the school. Pic/ AFP
A 22-year-old hospitality management student Matti Juhani Saari opened fire on students at vocational high school in Kauhajoki, Western Finland, on September 23, 2008, killing ten people and injuring one before shooting himself. Image: A view of the area near the school. Pic/ AFP
On April 16, 2008, 32 people were killed by a student named Cho Seung-Hui at the Virginia Polytechnic Institute and State University in Blacksburg, Virginia. Cho himself committed suicide. The incident, one of the worst school shooting in US history, is now referred to as Virginia Tech shooting. Image: Mourners pray during the first anniversary of Virginia Tech shooting on April 16, 2009. Pic/ AFP
On April 16, 2008, 32 people were killed by a student named Cho Seung-Hui at the Virginia Polytechnic Institute and State University in Blacksburg, Virginia. Cho himself committed suicide. The incident, one of the worst school shooting in US history, is now referred to as Virginia Tech shooting. Image: Mourners pray during the first anniversary of Virginia Tech shooting on April 16, 2009. Pic/ AFP
Around 70 people were killed and nearly 170 injured following a series of bomb attacks on students and teachers at the al-Mustansiriya University in Baghdad, Iraq, on January 16, 2007. Image: Iraqi university students walk around large concrete barriers put in place around al-Mustansiriya University to prevent car bombs attacks, in Baghdad, on 13 May 2007. Pic/ AFP
Around 70 people were killed and nearly 170 injured following a series of bomb attacks on students and teachers at the al-Mustansiriya University in Baghdad, Iraq, on January 16, 2007. Image: Iraqi university students walk around large concrete barriers put in place around al-Mustansiriya University to prevent car bombs attacks, in Baghdad, on 13 May 2007. Pic/ AFP
A disturbed young Brazilian man, Wellington Oliveira, on a suicide mission shot dead 10 girls and two boys on April 7, 2011 at Tasso da Silveira Municipal School, his former elementary school in Rio de Janeiro. (Image) Altar children look at flowers laid on a wall of the Tasso da Silveira Municipal School in Rio de Janeiro, Brazil, on April 13, 2011. Pic/ AFP
A disturbed young Brazilian man, Wellington Oliveira, on a suicide mission shot dead 10 girls and two boys on April 7, 2011 at Tasso da Silveira Municipal School, his former elementary school in Rio de Janeiro. (Image) Altar children look at flowers laid on a wall of the Tasso da Silveira Municipal School in Rio de Janeiro, Brazil, on April 13, 2011. Pic/ AFP
An expelled student, Robert Steinhu00c3u00a4user, killed 16 people -- 13 faculty members, two students, and one police officer, at Gutenberg-Gymnasium in Erfurt, Germany, on April 26, 2002. Steinhu00c3u00a4user himself committee suicide. Image: Flowers lay on the chairs prior to the beginning of the funeral service and a mass on the steps of the Cathedral in Erfurt, eastern Germany, on May 3, 2002, seven days after the shooting incident. Pic/ AFP
An expelled student, Robert Steinhu00c3u00a4user, killed 16 people -- 13 faculty members, two students, and one police officer, at Gutenberg-Gymnasium in Erfurt, Germany, on April 26, 2002. Steinhu00c3u00a4user himself committee suicide. Image: Flowers lay on the chairs prior to the beginning of the funeral service and a mass on the steps of the Cathedral in Erfurt, eastern Germany, on May 3, 2002, seven days after the shooting incident. Pic/ AFP
In one of deadliest school attacks in UK, a gunman, Thomas Hamilton, took the lives of 16 children and one teacher at Dunblane Primary School near Stirling, Scotland on March 13, 1996. He committed suicide after the act. Image: Hundreds of children's toys and cards line, on March 16, 1996 the corridors of Dunblane Primary School. Pic/ AFP
In one of deadliest school attacks in UK, a gunman, Thomas Hamilton, took the lives of 16 children and one teacher at Dunblane Primary School near Stirling, Scotland on March 13, 1996. He committed suicide after the act. Image: Hundreds of children's toys and cards line, on March 16, 1996 the corridors of Dunblane Primary School. Pic/ AFP

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