MISSOULA, Mont. -- The FBI released surveillance pictures showing two missing children who are subjects of an Amber Alert with two adults at a fast food restaurant in Montana.

The release of pictures taken at a McDonald's restaurant in Missoula, Mont. followed tips that the children and their father were seen on there on Tuesday.

Earlier in the day, the FBI told the Missoula County sheriff's office that an ATM card belonging to the father, John Baugher, was used at an ATM near the Missoula airport, KHQ of Spokane, Wash., reported.

The children, Remi Baugher, 4, and 2-year-old Lars Baugher, both reportedly had shorter hair than when they disappeared, according to the tips. The man with them had several days' growth of beard.

Baugher, 34, was charged Monday in Walla Walla County, Wash., Superior Court with two counts of first-degree custodial interference, accused of failing to return his children to their mother, who has custody, after a visit, Walla Walla police said. A warrant was issued for his arrest, with bail set at $100,000.

A two-tone 1978 Volkswagen van that Baugher had been driving was found abandoned Monday near Springdale, Wash., north of Spokane.

The three were last previously seen late Friday in Waitsburg, north of Walla Walla, Wash.