ST. PETERSBURG, Fla. -- St. Petersburg Police is investigating a serious injury crash.

Charles A. Durden, 58, was headed eastbound on 1st Ave. South, in the curb lane, approaching 19th St. South.

Norman Kranz, 77, was headed southbound on 19th St. South at 1st Ave. South. Carol Kranz, 79, was the front right passenger of Kranz's Chrysler van.

After stopping at the stop sign, Kranz attempted to cross 1st Ave. South and drove into Durden's path, causing Durden's Dodge Truck to strike the passenger side of Kranz's vehicle.

Both Norman and Carol Kranz were transported to Bayfront Health in St. Petersburg.

Norman Kranz is in stable condition. Carol Kranz is in critical condition.