WEST COVINA (CBSLA.com) — A couple’s unusual engagement stopped traffic—literally—on a West Covina freeway Sunday afternoon.

The California Highway Patrol said hundreds of motorcyclists shut down the eastbound lanes of the 10 freeway at Barranca Avenue for one minute to celebrate an unidentified pair’s marriage proposal.

A video of the incident, which was posted on YouTube, showed a man presenting a woman with a ring, motorcyclists doing wheelies and the popping of a pink smoke bomb in the middle of the highway.

Unsuspecting motorists were stuck behind the commotion.

(credit: YouTube)

An off-duty CHP officer who happened to be in the area alerted police and local CHP, who then issued 20 citations for what they considered a public safety hazard.

Officials said the motorcyclists conducted their own traffic control enforcement and ran red lights, along with stop signs.

The freeway shutdown is under investigation.

The District Attorney is considering criminal charges.

KCAL9’s Suraya Fadel was unable to reach the couple at the center of the controversy for comment.