Dutch police have investigated 150 complaints lodged by sympathizers of the Gulen Movement for threats and intimidation they receive on social media, Reuters reported on Monday.

While the investigations have resulted in the arrest of a 42-year-old Dutchman of Turkish descent so far, Reuters quoted prosecutors as expecting more arrests to take place.

Suspected of having threatened to Gulen sympathizers on the Internet as well as in person, the arrested man is a supporter of Erdoğan, according to the news agency.

Earlier in August, a Turkish man, believed to be a follower of the Gulen movement, was attacked in the head a day after Turkey’s Consul General in Rotterdam called on people to “do their part” against the movement which the government accuses of orchestrating the July 15 coup attempt.

Turkish government has gradually geared up its discriminatory discourse against the movement since July 15. Several stores across Turkey that sell books of Fethullah Gülen, the US-based Muslim cleric whom the movement inspired from, have earlier been reported to be looted by angry mobs.