Locals are being advised to use the Athy Distributor Road.
Leinster Street in Athy is closed to traffic.
Kfm understands that it is due to a road traffic incident involving a child who was struck by a car.
He was brought to Children's Health Ireland Hospital in Crumlin last night.
The incident happened at around 10.30pm.

Kfm Obituary Notices
Kildare Represented By Three Teams At National Bowls Competition
National Parents Council Conference Taking Place In Kildare School This Weekend
Yellow Fog Warning Issued For Kildare
"No Movement" On Safety Upgrades To "Dangerous" Newbridge Bus Stop, Says Cllr
Almost €68K Announced For Kildare Community Centres
Sallins Man Onboard Diverted Aer Lingus Flight Shares His Experience