French police suspect that people who put pigs' heads outside Paris mosques on Monday night were acting under orders from a foreign intelligence service, probably Russian.

The heads were found on Tuesday morning outside nine mosques in central Paris and surrounding suburbs, prompting a wave of outrage and condemnation.

Investigators have now stated that the two individuals involved drove a Serb-registered car, used a Croatian mobile telephone, and crossed into Belgium shortly after the incident.

The incident bears striking similarities to a series of other provocations that include vandalism against Jewish and Holocaust memorials in recent months.

Police have identified a Moldovan connection in previous cases, revealing a trend of foreign elements allegedly trying to destabilize social harmony in France.

An intelligence report suggests a strategy employed by Russian operatives to create discord within French society by utilizing proxies to carry out these disturbing acts.

Authorities urge vigilance against such tactics, as tensions continue to rise amid ongoing diplomatic challenges.