Federal law enforcement officials are looking for the person who robbed a U.S. Postal Service letter carrier at gunpoint last month in Antioch.

The U.S. Postal Inspection Service is offering up to $150,000 for information leading to the arrest and conviction of the suspect.

The incident occurred at approximately 6:40 p.m. on Nov. 29, while the carrier was delivering mail on Lawton Street in Antioch.

The suspect is believed to be a woman with a medium build in her late 20s or early 30s. She appeared to be 5 feet 6 inches or 5 feet 7 inches and wore a black or blue hooded sweatshirt, with a mask or scarf covering her mouth. She was last seen running west on Lawton Street. 

Anyone with information can call law enforcement at the U.S. Postal  Inspection Service at 1 (877) 876-2455. Ask for law enforcement. The case number is 4432888.