Kanpur: A low-intensity explosion occurred inside the toilet of a Kanpur-bound superfast train on Wednesday, police said, adding there were no injuries or casualties. Police also recovered a handwritten note in connection with the blast in the general coach of the Kanpur-Bhiwani Kalindi Express near Barrajpur station, close to Kanpur around 7:10 pm

"A handwritten letter was found in a plastic bag there, listing out a plan of today's incident. Prima facie it seems to be an act of mischief," said Kanpur SSP Anant Deo.