RAMALLAH (Ma'an) -- Israeli forces detained a former prisoner on Tuesday after raiding his home in Ramallah, witnesses said.

Israeli military forces surrounded a residential building in the Umm Al-Sharayet neighborhood and arrested Anas Shehadeh Kaswani, 32, locals told Ma'an.

He was taken to an unknown location.

An Israeli army spokeswoman said 12 people were arrested overnight for "illegal activity", without providing further details.

Four were detained in Nablus, five in Ramallah and three in Hebron, she said.