Financial Times Asia news editor Victor Mallet was given only a seven day tourist visa by the Hong Kong authorities when he returned to the city on Sunday, the newspaper said.
The Briton was "permitted entry into Hong Kong on a seven day visitor visa as he returned from an international trip on October 7. This follows the rejection to renew his routine work visa," the Financial Times said in a statement issued by the local office in the SAR.
"Immigration officials did not provide an explanation for the shortened visitor visa, and we continue to seek clarification from the Hong Kong authorities about the rejection of his work visa renewal."
The paper said it will not be commenting beyond the statement.
Local media reports had said Mallet was held at the airport for an hour before he was given the short stay visa and allowed to enter Hong Kong.
Travellers arriving in Hong Kong on a British passport are usually allowed to stay in the city as a tourist for six months.
Meanwhile, thousands of people have put their names to a signature campaign organised by several journalist associations against the work visa rejection.
The petition, organised by the Hong Kong Journalists Association, the Foreign Correspondents' Club and others, had garnered over 7,000 signatures by noon on Monday.
The petition was to be submitted to the government later in the day.