All lanes of Interstate 15 at Miramar Way were reopened Thursday after they were shut down due to a hoax.

The incident occurred at about 3:15 p.m. According to authorities, a woman driving on I-15 received a call from an anonymous person who told her there was a bomb in her car.  The woman, who had no idea who the call came from, pulled over and immediately called 911.

Both the northbound and southbound lanes of I-15 at Miramar Way were shut down while authorities – including the bomb squad – investigated.

About an hour later, the woman received another call, and this time the caller identified himself as her brother.

"The brother had called her and made a hoax phone call," an official said.

Authorities determined the call was a prank and arrested the woman's brother.

"Well it's very unfortunate people are not thinking when they make these jokes," the official said. "Obviously, there was thousands and thousands of people that were stuck in traffic for over an hour based on this hoax, so I would hope that ...  We take it very seriously and this why we arrested the brother of the victim."

Authorities say the man will face a felony charge of making a false threat.

Both sides of the freeway were reopened by about 5:30 p.