UPDATED at 6 p.m. with more information on chase route from police.

SOUTH COUNTY • A bank-robbery suspect led police on a wild chase that ended up going the wrong way on Interstate 270 Thursday afternoon until he was blocked and arrested, authorities said.

The robbery took place at 1:17 p.m. at the Simmons First National Bank, 8151 Clayton Road in Clayton, where a man obtained an undisclosed amount of cash and drove away in a brown van. Officers from Clayton and Richmond Heights followed the suspect's van into the city, where St. Louis officers joined the chase six minutes after the robbery.

Clayton Police Capt. Stewart Glenn said the pursuit led onto Interstate 44 east to Interstate 55, then south to Interstate 270, where the van headed west to the interchange at Tesson Ferry Road. There, the suspect reversed course and began speeding down the wrong way of I-270 back toward I-55, where a line of waiting police cars finally blocked his escape.

Glenn said officers arrested the driver and a person who had jumped from the van only a short distance from the final stop. The second person's story was "murky," Glenn said, but there were no reports of kidnapping or carjacking.