Police officers escort a suspect arrested in connection with a suicide truck bomb attack on the Marriott Hotel as he leaves an anti-terrorism court in Rawalpindi on Friday. Police officers escort a suspect arrested in connection with a suicide truck bomb attack on the Marriott Hotel as he leaves an anti-terrorism court in Rawalpindi on Friday. (R.S.Khan/Reuters)

Four Pakistani men have been arrested in connection with September's suicide attack on the Marriott Hotel in the Pakistani capital, Islamabad, police said Friday.

The four are suspected of "indirect involvement" in the attack, said police Chief Ahmad Latif.

The suspects were arrested in different parts of Punjab province, Latif said, but gave no more details.

Authorities have said they suspect the bombing was carried out by militants based in the tribal regions near the border with Afghanistan.

The men were brought before an anti-terriorism court in Rawalpindi on Friday where a judge gave police permission to hold them for questioning for one week.

The truck bomb that detonated outside the Marriott Hotel on Sept. 20 killed 53 people, including the Czech ambassador to Pakistan and two U.S. Department of Defence officials.

Another 270 people were wounded.

The blast was powerful enough to destroy the front of the five-storey building and leave a crater 10 metres deep. It reverberated throughout Islamabad and shattered windows hundreds of metres away.

With files from the Associated Press