A man jumped off a boat while swimming in the Kaskaskia River at about 8:30 p.m. Saturday, and did not resurface, according to the Illinois Department of Natural Resources. Searching was suspended on Sunday evening and is expected to resume on Monday at 8:30 a.m.
Conservation police and others began searching soon after he was reported missing and searched through Sunday. Chris Young, IDNR spokesman, said searchers used sonar and were joined by a nonprofit group that used a helicopter to check fields.
Young said the man was reported missing on the river south of Illinois 177/160, east of New Memphis Station.
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At around 9 p.m. Saturday, St. Clair County Special Emergency Services responded to a call for water rescue. The Swansea Fire Department was also dispatched to assist.
Young did not have any information about the man, who he was with, or the type of boat he jumped from.
The staging area Sunday afternoon for IDNR and other emergency crews is the New Memphis Station bar and restaurant, 2443 Wittenburg Road, New Baden. About a dozen onlookers surrounded the area at noon.
Emergency personnel currently assisting with the search includes Fayetteville Fire Department, Clinton County Emergency Management Agency and Clin-Clair Fire Protection District.
Various underwater rescue crews have been involved as well, an emergency crew member said.