Ugandan police has arrested 17 suspects, including six foreigners, relating to the bomb attacks that killed 74 people last Sunday in suburbs of the capital city of Kampala, police chief said in Kampala on Friday.

Kale Kayihura, the Inspector General of Ugandan Police, told reporters at a prayer ceremony at Pan African Square in downtown Kampala to mourn the victims of the attacks that the arrested suspects included four Ethiopians and two Pakistani sheikhs.

Some of the foreign nationals were detained for questioning as they have links with al Shabab, a Somali armed faction believed to be responsible for the Kampala bomb attacks, while others were held for forged documents, he said.

The country is currently in a week long national mourning starting from Tuesday.

Three bombs went off late Sunday night at a rugby club and an Ethiopian restaurant in Kampala suburb, killing 74 people gathered to watch the World Cup final. 13 foreigners were among the victims including six Eritreans, an Ethiopian, Kenyan, American, Congolese, Sir Lankan, Indian and an Irish female.

Al Shabab with known links with al Qaeda has claimed responsibility of the deadly attacks.

Ugandan government said it had put sufficient security measures in public places and along all the border posts to ensure the safety of over 40 African heads of state and government attending the African Union summit here slated for July 25 to July 27.