IOWA CITY — Authorities are continuing their search Friday for a possible body in the Iowa River.Johnson County Sheriff Lonny Pulkrabek said the search resumed around 8 a.m. in the river near the Iowa Avenue Bridge. The search, which began late Thursday morning, was suspended when it got too dark Thursday evening.The University of Iowa Department of Public Safety contacted the sheriff’s office after locating “evidence which strongly suggests someone may have entered the river from the Iowa Avenue Bridge,” university spokeswoman Hayley Bruce told The Gazette.