A teen-age mother unable to get a baby sitter kept her infant in the back seat while she robbed a bank at gunpoint and led police on a chase that ended with her car slamming into a roadblock, authorities said.

The 5-month-old child was apparently unharmed, his distraught father said."It was a very terrible day," said Shawn Richberg, 20, a Navy seaman apprentice who lives in this city about 45 miles north of Chicago. "I'm worried and lost and just don't know where to start or what to do."

When asked how his son, Shawn Maximillian, was doing, Richberg said: "He's fine. ... He's snoozing. It was a big day for him."

Authorities said the infant's mother, 19-year-old Tammy L. Richberg, was charged with armed violence and armed robbery. She was ordered held on $1 million bail.

Short on cash and hard up for a baby sitter, Mrs. Richberg took her baby with her Tuesday morning and left him in a child car seat when she went to hold up the First of America Bank in Zion, police said.