Hong Kong police have announced a fresh round of arrest warrants for six activists based overseas, with bounties set at $1 million Hong Kong dollars for information leading to their arrests.

Hong Kong offered bounties of HK$1 million ($128,728) on Tuesday for six more pro-democracy campaigners deemed to have violated national security laws, and revoked the passports of seven more, as the Asian financial hub keeps up a security campaign.

A Vancouver-based activist is accusing Hong Kong authorities of meddling in Canada’s internal affairs after police in the Chinese territory issued a warrant for his arrest.