The series of deadly bomb attacks continues in Pakistan, after at least 20 people were killed Tuesday in two bomb blasts in Pakistan’s eastern city of Lahore, the second largest Pakistani city after the capital, Islamabad.

The first explosion took place at a federal police building downtown Lahore, and it may have been a suicide attack, according to some police officials. Most of the victims died in this attack at the Federal Investigation Agency (FIA) at 9:25 a.m. local time. FIA official Mirza Mohammed Yasin told reporters that the explosion was caused by a bomb placed near an elevator inside the building, BBC reports.

Rizwan Baseer, the head of the provincial government’s rescue agency, said 18 people had been killed in FIA explosion. A hospital official said that about 50 people were wounded. Officials also fear that the death toll can rise, if they don’t manage to take out the people trapped under the debris.

“We’re trying to evacuate the wounded trapped under the debris,” said Tariq Pervez, the director general of the FIA. They also fear that the building might collapse anytime.

Television showed images from Lahore, in which the multi-storey building was badly damaged, vehicles were charred and trees uprooted.

The second explosion was caused by a car bomb at an advertising agency in a residential neighborhood in Lahore about six miles away. Mian Ejaz, the City Administrator, said that it killed two children, Times Online informs.

Despite the terror attacks, President Pervez Musharraf said: “Acts of terrorism cannot deter government’s resolve to fight the scourge with full force.”

Pursuant to the attacks, the Australian cricket team cancelled an upcoming tour to Pakistan, over security grounds. The suicide bomb attacks have killed 600 people in Pakistan this year.

Last week, two suicide bombers blew themselves up at a naval college in Lahore, killing at least five people and wounding 19. On January 10, a militant approached a group of police officers guarding a courthouse and detonated himself, killing 24.

Tuesday’s bombings come after the moderate parties announced that they would form a coalition government, to achieve political stability in Pakistan.