A Polish photojournalist kidnapped in Syria in July is alive, Poland's foreign affairs minister announced on Saturday.

Radoslaw Sikorski confirmed to radio RMF FM that Marcin Suder was "alive" but said he could not give any details about his health or whereabouts for his "own good".

Suder, a freelancer who worked for the Corbis agency and other outlets, was abducted by masked gunmen on July 24 during a raid on a media centre in Saraqeb, in the northwestern province of Idlib.

No reason was given for his kidnapping and no one has claimed responsibility for the abduction.

International press freedom watchdog Reporters Without Borders (RSF) says Syria is the world's most dangerous country for journalists to work in.

It says that 25 journalists have been killed there, as have 26 citizen journalists, since the start of the Syrian revolt in March 2011.