An attempted scam was foiled by a savvy senior citizen, and the man behind it was arrested, Nassau police say.

According to police, a 72-year-old Bellmore resident received a call at his home around 3 p.m. on Wednesday from a man claiming to be his grandson. The man said he was under arrest and he needed money for bail. He gave the Bellmore man another number to call to set up the bail amount and delivery.

Police say the victim became suspicious and was aware of scams targeting senior citizens. He called the First Precinct and spoke to detectives.