Croatian police representatives are en route to Belgrade to help in the search for Matej Peris of Split, Prime Minister Andrej Plenkovic said on Monday.

“I asked the interior minister to send a team of Croatian police representatives to Belgrade. They are en route today,” he told the press.

Peris, 27, went missing in the early hours of 31 December after coming out of a night club in Serbia’s capital, where he came with a group of friends to spend New Year’s Eve. He was last seen on surveillance camera footage running around the city.

Plenkovic thanked the Serbian police for their efforts to date and everyone participating in the search. He said “it’s key that Mr Peris’ family, as well as the entire Croatian public, get the full story” of what happened to the young man.