ISTANBUL (AP) — Turkey's state-run agency says anti-terrorism police have detained over 420 people over alleged links to the Islamic State group.

The Anadolu Agency says Sunday that 60 IS suspects, the vast majority of them foreigners, were taken into custody in the capital, Ankara. It says a total of 423 people were detained in simultaneous police operations that spanned several cities, including Istanbul and Gaziantep, near the border with Syria.

The largest operation was in the southeast province of Sanliurfa, where police took into custody more than 100 suspects from multiple addresses and found materials relating to Islamic State militants.

Turkey, which endured a failed coup attempt and dozens of bloody attacks linked to IS or Kurdish militants in 2016, has been stepping up its anti-terrorism efforts.