HONG KONG—Hong Kong’s pro-democracy newspaper Apple Daily said on Sunday the freezing of its assets in a national security probe had left the newspaper with cash for “only a few weeks” of normal operations and it may struggle to pay staff wages. The newspaper, whose chief editor and chief executive have been detained under the new security law and whose offices were raided by 500 police officers on Thursday, said the announcement was made in a management meeting on Friday. Three companies related to Apple Daily are also being prosecuted for collusion with a foreign country and authorities have frozen HK$18 million ($2.3 million) of their assets. Apple Daily plans to ask the government’s Security Bureau to unfreeze the assets on Monday and failing that attempt, it may look to challenge the decision in court, the newspaper reported. “The freezing of the assets of the three companies not only affects …