United States Postal Service officials say thieves broke into four mail trucks over the past two months in San Jose.

The post office is offering a $10,000 reward with information that might help them catch the person or persons responsible for the thefts.

The most recent incident occurred last week in the Willow Glen neighborhood. Officials said someone broke into a locked USPS truck and took off with a mail bag while a carrier was delivering mail.

“They’re getting into locked vehicles,” US Postal Inspector Jeff Fitch said. “They’re getting in and taking some of the mail.” Read more at NBC Bay Area