Islamabad/Lahore (PTI): Amid warning by intelligence agencies that 14 terrorists had sneaked into the federal capital and Lahore, Pakistan Premier Yousuf Raza Gilani on Thursday ordered authorities across the country to beef up security at key institutions and remain vigilant to thwart possible militant attacks.

Mr. Gilani chaired a high-level meeting in Islamabad and asked Interior Ministry chief Rehman Malik to enhance security at important institutions and ensure the safety of people, an official statement said.

The meeting came as Pakistani intelligence agencies warned authorities that 14 terrorists had entered Islamabad and Lahore in the guise of preachers to carry out strikes.

The warning follows Taliban commander Baitullah Mehsud's threats that his group planned to carry out more attacks across the country in retaliation for continued US drone attacks in tribal areas bordering Afghanistan.

Mehsud's top commander Hakimullah's compound was targeted by a drone fired missile attack on Wednesday, killing 14 militants, including foreigners, in Aurakzai agency. After the missile strike, Hakimullah warned that "the pain of this attack will be felt in Islamabad".

Mehsud had claimed responsibility for Monday's attack on the police academy at Manawan near Lahore and threatened to carry out more such strikes "in the next few days".