File photo ... Spanish police have reportedly arrested a man suspected of supplying arms to supermarket gunman Coulibaly in the January 2015 Paris attacks. Picture: Supplied.

Antoine Denive, 27, was detained in a joint Franco-Spanish raid on a house in Malaga, Madrid authorities say, reports the BBC.

The Frenchman is suspected of fleeing France weeks after the 9 January supermarket siege and was said to have had ties to Serbs who may have provided him with arms and ammunition.

Spain’s High Court said on Wednesday that Denive had denied selling arms to Coulibaly but said he was willing to be extradited to France, reports Reuters. The court would send Denive to be tried in France unless there was another case against him in Spain, El Pais newspaper said.

Coulibaly stormed the supermarket a few days after two other gunmen shot 12 people at and near the offices of the Charlie Hebdo newspaper in Paris. He killed four Jews and a policewoman before being shot dead by police.