French judicial authorities are investigating five people after uncovering an ultra-right plot to attack a religious venue.

A judicial official said Tuesday that two people, one a minor, were arrested and placed under investigation in May for criminal terrorist association. Three others were arrested in the probe that was opened in September in Grenoble, southeast France. The anti-terrorism prosecutor�s office took over the case.

The official said only one of the four was being held.

He was confirming portions of a BFMTV report saying that targets were Muslim or Jewish. The official, who requested anonymity because he wasn�t authorized to speak publicly, didn�t say at what stage the plot was or what the target was.

There was no link with a 2017 ultra-right plot against mosques and migrants.

(AP)