Hong Kong (AP) - In the riots in Hong Kong, activists and police tug-of-war over the siege of a university. About 100 students have barricaded themselves for the third day in a row at the Polytechnic University, which has been sealed off by police forces. Prime Minister Carrie Lam said the security forces wanted to solve the occupation peacefully. "We are extremely concerned about the dangerous situation on campus," she said. Lam called on activists to stop the violence, give up their weapons and leave peacefully.