BAGHDAD, Iraq: Iraqi government has tightened security at major holy shrines in response to the deadly suicide attacks at the holy shrine of Al-Imam Musa bin Jafar Al-Kadhim (AS) in Kadhimiyah.

More than 75 pilgrims were martyred and 125 injured in the two blasts by two female suicide bombers happened on Friday April 24 within minutes of each other at separate gates of the holy shrine shortly before the start of prayers as worshippers streamed into the mausoleum.

A hospital official confirmed the toll, adding that 125 were also wounded in the bombing. Many were Iranian pilgrims on their way to pray at the shrine.

Friday's attack was the single most deadly this year.

Prime Minister Nouri al-Maliki has ordered a military task force to investigate Friday's attack. He also suspended the area commanders for failing to provide adequate security around the shrine.

Security has been tightened and checkpoints added around the shrine in the northern Baghdad neighborhood of Kadhimiyah, a police official said.

The government also ordered additional security forces deployed to the southern holy cities of Najaf and Karbala, home to two other important shrines, another police official said.

All the officials spoke on condition of anonymity because they were not authorized to release the information.

Black banners bearing the names of the dead were hung Saturday at the site of the attacks, while candles and flowers were laid on the ground.

Maraje and Ayaat have strongly condemned the terrorism urging the countrymen to remain united in order to thwart the heinous conspiracy.