BOULDER, Colo. — A Colorado school district has added safeguards after a scammer stole about $850,000 of bond construction money.

The Daily Camera reports (http://bit.ly/2vovngd ) the theft came to the district’s attention when contractor Adolfson and Peterson Construction asked for a payment on a past due account, even though the district had been sending payments.

The police report says the scam started when the Boulder Valley School District’s accounts payable department received a call from someone claiming to be with Adolfson and Peterson asking to change the way the company was paid.

The district instructed the person to fill out a form, which was returned with the signature of the company’s chief financial officer. That was later found to be a forgery.

An arrest warrant was issued for 36-year-old suspect Sherifdeen Mogaji.