Crews from Limerick Fire and Rescue were dispatched after the alarm was raised
Emergency services were deployed this Monday evening following reports that a woman had entered the river Shannon at Thomond Bridge.
The alarm was raised at around 6.50pm and crews from Limerick Fire and Rescue deployed the FireSwift rescue boat within minutes.
Gardai also attended and paramedics from the National Ambulance Service were placed on standby.
Thorough searches were carried out in the vicinity of Thomond Bridge and the call, the second in recent weeks, was deemed to be a hoax.
An investigation will be carried out by gardai.