PHILADELPHIA -- An employee of a North Philadelphia Islamic school discovered a pig's head early Monday morning at the building, according to philly.com.

The report states that a pick-up truck was caught on surveillance video driving past the Al Aqsa Islamic Society twice late Sunday. Something is seen being thrown from the truck as it passes for the second time.

The incident is under investigation by both local and federal law enforcement agencies. Those who practice Islam abstain from eating pork, as the Quran forbids them from doing so. Believers argue that pigs are "scavengers" that " live and thrive on muck, feces and dirt," according to whyislam.com.

The report adds that someone called the mosque, which was established in 1996, after the Paris terror attacks last month and made derogatory comments about Allah. Monday's incident is under investigation by both local and federal authorities.

On Sunday, President Obama addressed last week's fatal shooting in southern California that left 14 dead. He said the two shooters killed by authorities practiced a "perverted" form of Islam and that the U.S. would continue its efforts to destroy ISIS forces.

Similar acts to what was found in Philadelphia have been carried out abroad. A severed pig's head was found on Sunday in a bathroom near a mosque at the University of Western Australia.

A similar incident was under investigation in England earlier this month after four pig's heads were found outside of a community center that had hosted a Muslim event.

Greg Adomaitis may be reached at gadomaitis@njadvancemedia.com. Follow him on Twitter @GregAdomaitis. Find the South Jersey Times on Facebook.