The police also detained the person whose cell phone was used to make the call.
The last thing he needed was to have the police detain him.
The police detained over 70 friends and family members for questioning.
Protesters' rights groups said that the military police detained 66 people in the process.
It was not even clear when the police first detained the suspects.
The police then detained at least 200 protesters, a party official said.
The police detained 20 Palestinians but no one had been charged.
Over the last few days, the police have detained more than 2,500 students, although most were released after being questioned.
So far in the investigation, the police have detained two suspects.
Police have detained the owner and production director of the factory.