Updated

The Latest on Turkey's investigation into a deadly weekend attack near a soccer stadium in Istanbul. (all times local):

5:50 p.m.

Turkey's interior ministry says 568 suspects have been taken into custody over alleged links to a Kurdish movement labelled as a terrorist organization in the country.

The ministry issued a statement Tuesday saying that two days of operations looking into who could be behind a weekend attack spanned 28 cities. The arrests come in the wake of twin bombings Saturday night near a soccer stadium in Istanbul that killed 44 people, mostly police, and wounded scores of others.

It was not clear if the number of detentions announced Tuesday included the 235 people that Turkey rounded up on Monday.

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12:30 p.m.

Turkey's police on Tuesday continued to detain members of a pro-Kurdish political party in the wake of deadly suicide bombing.

State-run Anadolu Agency reported that two lawmakers of the Peoples' Democratic Party, or HDP, have been taken into custody in Ankara, the capital.

The report said they were taken into custody within the scope of two separate terror-related investigations in the southeastern cities of Batman and Diyarbakir.

Widespread detentions of HDP officials by the Turkish security forces have taken place following a Saturday bombing near an Istanbul soccer stadium that killed at least 44 people and wounded 149. The attack was claimed by Turkey-based Kurdish militant group, the Kurdish Freedom Falcons.

The private Dogan news agency, meanwhile, reported that 8 HDP officials would stand trial on terror charges.

Turkish authorities, in a charge led by the president, accuse the HDP of supporting terrorism and having ties to the armed Kurdistan Worker's Party, or PKK.

The PKK has waged a decades-long insurgency against the Turkish state and violence between the two resumed last year after the collapse of peace talks.

Turkey and Western governments brand the PKK a terrorist organization. The HDP insists it is separate and spoken out against attacks in Turkey.

The political party has been one of the focal points of a wider security crackdown in the wake of a failed July 15 coup attempt.