Over 20 people were killed leaving many others injured following a vehicle bomb explosion in Iraqi capital Baghdad.
The attack - as Prime Minister Haidar al-Abadi met US President Donald Trump in Washington DC - targeted a busy commercial district of the Hay al-Amel suburb, according to police and hospital officials.
No one claimed responsibility for the attack, but Daesh has been behind previous Baghdad bombings.
ISIL took vast swathes of Iraqi territory north and west of the capital in 2014.
Federal police sources said that the officers have been killed and the Iraqi forces were trying to get their bodies, Reuters reported.
The Takfiri terrorists have suffered a string of defeats in Iraq over the past two years, but have continued to regularly carry out attacks in and around Baghdad.More news: 'Deadliest Catch': Allegations against Sig Hansen 'does not impact the show'
Iraqi troops are now closing in on Mosul's old city, where some of the fiercest fighting is expected to unfold.
Mr Abadi said in a video statement as he left Baghdad that his country was in "the final stages to eliminate IS militarily in Iraq".
Iraqi security forces fire a rocket towards Daesh positions in Mosul on Monday.
The attacks came as the Iraqi security forces backed by anti-IS global coalition are carrying out a major offensive to drive out the IS militants from its last major stronghold in Iraq's northern city of Mosul.
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