Closed-circuit video images showed the bus veering sharply in the road before crashing from a bridge and sinking within seconds
RTE quoted a witness at the scene as saying he saw foam being sprayed on one of the engines after it was stopped.
Ireland provides landing and refuelling facilities to the US military at the western Irish airport, the country's second busiest, particularly for transatlantic flights.
An average of around 300 US troops passed through Shannon Airport each day in the first three months of the year, according to Ireland's Transport Ministry.
A spokesman for the airport could not be reached for further comment.
Closed-circuit video images showed the bus veering sharply in the road before crashing from a bridge and sinking within seconds
EU foreign policy chief says there will be more nations following suit because Belgium has also decided to recognise Palestinian state
The vote by the 193-member General Assembly was a global survey of support for the Palestinian bid to become a full UN member
The case was filed against parties who took to their social media handle alleging that the brand was favouring a particular community
Ministry of Foreign Affairs calls for urgent, independent and transparent investigation into the incidents
The Princess of Wales announced in March she was having treatment after cancer was found following an abdominal surgery
Karim expressed her happiness at winning the medal, which added to the previous achievements of Emirati champions
Imarat has an established presence in the UAE through its subsidiary – Graana.com