UTV News is reporting that Army bomb experts are being sent to the scene of the small explosion in Belfast Cathedral quarter.
There are reports that restaurants and other premises in the area are being evacuated.
More top news
A man and a woman have been charged with murder after a badly burned body was found in the back garden of a house in south-west London.
After a chilly start, there will be some warm sunshine across southern and eastern parts.
Labour is ready for another election after June's vote "changed politics in this country", Jeremy Corbyn has declared.