ENGLEWOOD - The Department of Homeland Security is investigating threats made against a North Jersey mosque.

Englewood police say a person inside the Mehfil-e-Shah-e-Khorasan mosque received several threatening phone calls over the weekend. Authorities will not go into detail about the nature of the threats, but say they were likely made by the same person.

Authorities are trying to determine if the person behind the threats is part of a terrorist organization.

"At this point, we don't know if it was someone who is emotionally disturbed, if they picked a mosque at random by looking on the Internet or phone book," says Englewood Police Detective Tim Torell.

Shabih Haider, of Woodcliff Lake, attends services at the mosque and says it has been a part of the community for 37 years without any problems.

On Sunday, the Bergen County police bomb squad did a sweep of the mosque, but found nothing suspicious.

Police and Homeland Security agents are pursuing several leads, which includes tracing phone numbers.

Those who attend the mosque say they will not let the threats interfere with the observance of Ramadan.