The thieves managed to steal the sticky substance from a warehouse in Saint-Louis-de-Blandford between August 2011 and July of this year, ABC reported.

"It's one of the most important robberies in Quebec because of the quantity stolen and the value of the syrup," said Sgt.

Gregory Gomez Del Prado of Quebec police.

Quebec police arrested Stephan Darveau yesterday, after arresting three others on Tuesday, linking all four to the ongoing investigation.

Richard Vallieres, 34, Avik Caron, 39, and another unnamed suspect met in court yesterday on charges of conspiracy to commit theft, possession of property obtained by crime and fraud.

Quebec police have arrest warrants for four other suspects, the report said.

"We know there are probably more people involved. It's a complex case," said Simon Trepanier, director of the Federation of Quebec Maple Syrup Producers.

"At the beginning we knew it had been done by a very organised group because it