CNN reports Hong Kong media tycoon Jimmy Lai was arrested early Monday.<br />Lai is known for his support of the city's pro-democracy movement and criticism of China.<br />The arrest comes under the new security law imposed on the city last month by Beijing, which bans "collusion with foreign forces."<br />The Hong Kong Police Force say seven people were arrested, aged 39 to 72.<br />Charges against them include collusion with foreign forces to endanger national security, and conspiracy to commit fraud.<br />While it isn't the first time Lai has been arrested for political activities, this latest arrest is among the first since the security law was imposed on July 1st.