At least 63 people have been killed and dozens injured in twin suicide bombings outside Pakistan's main munitions factory in the town of Wah, police s

The attack is the deadliest on a military site in Pakistan's history.

Police say one man is in custody for the attack, which occurred some 30km (18 miles) north-west of Islamabad.

A spokesman for the Pakistani Taleban said they had carried out the attacks, which he said were a response to army violence in the country's north-west.

In pictures: Factory bombings

Speaking to the BBC, Maulvi Umar of the Tehrik-e-Taleban Pakistan said the bombings in Wah were in retaliation for the deaths of "innocent women and children" in the tribal area of Bajaur.

He said more attacks would take place in Pakistan's major urban conurbations unless the army withdrew from the tribal areas.

Pakistani Prime Minister Prime Minister Yousef Raza Gilani promised to punish the perpetrators.

US President Bush later telephoned Mr Gilani to pledge his support in tackling what he called terrorist attacks.

The leaders "reaffirmed their mutual support for going after these extremists that are a threat to Pakistan, the United States and the entire world," a White House spokesman said.

Wah is a strategically important town normally under heavy security as it is home to a large industrial complex producing conventional arms and ammunition, correspondents say.

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