Militants stormed a mosque near Pakistan's army headquarters, killing at least 35 worshippers, including military officers, during yesterday's worship. The killers sprayed gunfire and threw grenades before blowing themselves up, officials said.

Seventy others were wounded in the strike, the latest in a wave of attacks by Islamist insurgents that has killed more than 400 people in Pakistan since October. It was a bloody reminder of the resilience of militant networks despite army offensives against the Taliban in the northwestern regions bordering Afghanistan.

At least four attackers took part in the assault inside a heavily fortified area in the garrison city of Rawalpindi just a few miles from the capital. The Pakistani military said army officers were among the dead, but did not give more details. City residents said access to the mosque was mostly restricted to soldiers and their families.

Witnesses said two of the militants entered the mosque, which had up to 200 worshippers inside, while others ran into buildings nearby. Security forces exchanged fire with the assailants for an hour before they blew themselves up or killing them. Reporters were prevented from getting close.

Nasir Ali Sheikh saw the attackers at the mosque as he walked there to pray. He said they were dressed in traditional Pakistani clothing of loose pants and a long tunic and carried hand grenades, automatic weapons and ammunition belts slung around their shoulders.

"They were killing people like animals," he said. "I couldn't understand what was happening."

The mosque's walls and prayer mats were covered in blood and shattered glass littered the floor, TV footage showed.

third attack

The attack was the third in Rawalpindi in the last two months. In the most high-profile incident, a team of militants attacked the army headquarters on October 10 and held dozens hostage in a 22-hour standoff that left nine militants and 14 other people dead.

Three helicopters hovered overhead while trucks carrying commando teams and ambulances raced through the cordoned-off area as soldiers with rifles ready kept onlookers and traffic away.

The attack began when several gunmen staged an explosion to break through a checkpoint close to the mosque, said Yasir Nawaz, a police official at the scene.

He said the installation included an army parade ground as well as the mosque, which was often used by military officers.