At least one person was killed and ten others including two Americans were injured in a blast that took place early Friday morning in Pakistan's northwestern city of Peshawar.

A spokesman of the U.S. Consulate in Peshawar of Pakistan said that the vehicle damaged in Friday morning's blast in the city belonged to the consulate and the two Americans injured in the blast were consulate employees.

The spokesman did not disclose any other details about the two injured Americans.

Local media reports quoted police sources as saying that the two Americans injured in the blast were shifted to the consulate instead of being sent to local hospital.

Police said that the blast which took place early Friday morning was apparently targeting at the U.S. consulate vehicle as a road-side planted bomb went off just when a U.S. consulate Toyota Landcruiser, together with another consulate vehicle, passed by on the Abadarra road of the University town of the city.

The tail part of the Landcruiser was seriously damaged, said police, adding that the other consulate vehicle remained intact in the blast.

It could be due to the poor timing of the blast, said police, adding that otherwise the consequences could be more serious as the remote control bomb contained an estimated 50 kg of explosives.

Apart from the two injured Americans, at least one was killed and eight others were injured in the blast that went off at about 8:25 a.m. Friday morning.

No group has claimed the responsibility for the blast.

Pakistan Taliban and al-Qaida have vowed to avenge the death of Osama bin Laden by threatening to launch attacks on the United States and Pakistan after he was killed early this month by the U. S. special task forces in Pakistan's northwestern city of Abbottabad.