Arrests are the first case of the city’s national security law being used to target the relatives of pro-democracy campaigners

Human rights groups have condemned the arrest of relatives of Anna Kwok, an exiled pro-democracy activist who is wanted by the Hong Kong police, in the first example of the city’s national security law being used to target the family members of an activist living overseas.

Kwok, 28, is the executive director of the Washington-based Hong Kong Democracy Council, and is one of 19 overseas activists wanted by the national security police, who are offering bounties of HK$1m (£97,000) for information leading to arrest.