At least one person was killed in a suicide bomb attack at a bank in Islamabad on Monday.
The bomber walked into the bank and blew himself up when the security guard tried to search him, witness Hammad Ahmad said. The guard died and three people were wounded, reported Reuters.
So far no group has claimed responsibility for the attack.
Pakistan's Taliban movement often stages suicide bombings but not in the capital. The last serious attack in Islamabad was in December 2009.
The attack showed all possibilities of an attack usually carried out by Pakistani Taliban, an al Qaeda-linked group that has proven resilient in the face of several army offensives against its strongholds, said the report.
The explosion left blood with shards of glass and cables ripped from walls and the ceiling. Body parts were seen scattered across the debris, the report said quoting witnesses at the scene of attack.
The Taliban have staged several large-scale attacks to avenge the killing of al Qaeda leader Osama bin Laden by U.S. special forces in a Pakistani town on May 2. They have targeted paramilitary cadets, a naval base and a U.S. consulate convoy since then.