HONG KONG -- Hong Kong police said on Tuesday they had arrested another 13 suspects related to illegal activities in the past two months.

Police said 11 men and two women, aged 19 to 40, had been arrested in the past few days for offences including unlawful assembly, criminal damage, access to computer with criminal or dishonest intent, and possession of offensive weapons.

The rallies had become increasingly violent, said Tse Chun-chung, chief superintendent of police public relations branch, at a press conference.

"No illegal or violent behavior can be glorified or justified," said Tse, adding that the police will not tolerate illegal activities including violence.