The toll from Saturday's attacks, which struck an Istanbul football stadium and a nearby park, rose to 44 today, Health Minister Recep Akdag said -- 36 of them police officers.
Turkish jets pounded targets in northern Iraq, with the military saying it had hit "separatist terrorist organisation members", referring to the outlawed Kurdistan Workers' Party (PKK).
The armed forces said they struck targets in the Zap region of northern Iraq, destroying militant headquarters as well as nearby shelters and gun positions.
The ministry did not give specific numbers of how many pro-Kurdish Peoples' Democratic Party (HDP) officials and its sister Democratic Regions Party (DBP) were detained in early-morning raids.
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The actions are likely to raise fears Ankara is going further in its crackdown and acting out of revenge against pro-Kurdish politicians who stand accused of links to the PKK -- a charge that the HDP denies.
The weekend's bloodshed was claimed by the Kurdistan Freedom Falcons (TAK), seen as a radical offshoot of the PKK which is itself regarded as a terrorist group by the European Union and the United States.
In the aftermath of the attacks a defiant President Recep Tayyip Erdogan promised to fight terror "to the end".
Since the collapse of a ceasefire in July last year, Ankara has vowed to wipe out the PKK and has conducted several military operations against the group.
There have been frequent clashes between security forces and PKK militants and almost daily attacks on the military carried out by the group's fighters in the southeast.
Today, television showed Erdogan visiting the scene of the attacks with ministers. He later attended the funerals of some of the slain police officers, an AFP photographer said.
Most of those killed by the car bomb outside the stadium were officers who had been policing a top flight game against Bursaspor.
Besiktas is one of Istanbul's most popular football clubs, and its fans are known for their anti-establishment views. They famously played a big role in the 2013 protests against Erdogan, who was prime minister at the time.
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