A five-kg bomb and two pistols were found in a bag along the road near the National Institute of Health, Geo News quoted Pakistan Rangers sources as saying.
The report said that bomb disposal squad reached the site and defused the bomb.
Musharraf was on his way to appear in a special court Tuesday for hearing in the case of high treason openeed by the government against him.
After the news of threats to Musharraf’s life surfaced, the special court delayed the proceedings till 11 a.m. Tuesday.
Musharraf has been charged with suspending the constitution when he imposed Emergency in November 2007. Legal experts say the charges carry death penalty or life imprisonment.
A three-member special court began the trial at the building of National Library near the Supreme Court. The court summoned Pervez Musharraf to appear before the judges drawn from a panel of judges of the country's five high courts, reported Xinhua.