HARRISONVILE, Mo. — The FBI increased the reward for information leading to the arrest of two escaped fugitives as the search grows.

Trevor Scott Sparks and Sergio Perez-Martinez escaped from the Cass County jail last week. The two men were being housed in the jail awaiting sentencing on federal convictions.

The FBI is offering up to $10,000 in the case. The money is in addition to $5,000 that is being offered by the U.S. Marshals.

The FBI also added “wanted” pictures of the men to six billboards along Interstates 435 and 70.

The FBI warns the men should be considered armed and dangerous.

Sparks, 33, has blue eyes and weighs 185 pounds. He has a number of tattoos, including full sleeves on both arms.

A federal jury convicted Sparks of leading a criminal conspiracy linked to two
murders, multiple violent assaults and distribution of narcotics.

Martinez, 43, has brown eyes and weighs 130 pounds. He also has several tattoos, according to the FBI.

He pled guilty in July to conspiracy to distribute methamphetamine and money laundering.

The FBI doesn’t think the two men are traveling together.

Anyone with information about where either man may be hiding is asked to call the FBI at 1-800-CALL-FBI or submit a tip online at tips.fbi.gov.