Luas services were suspended after a van crashed into a tram in south Dublin.
Gardai were alerted to the crash at the Bluebell stop this afternoon.
There were no trams on the Red Line between Bluebell and The Point while emergency services worked to make the scene safe.
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Luas passengers were asked to use their tickets on Dublin Bus for the duration of the disruption.
The Red Line has since been opened but commuters are facing delays of up 40 minutes.
A garda spokeswoman said: "Gardai attended the scene of a two-vehicle road traffic collision this afternoon at Bluebell Luas stop.
"A van collided with a Luas. No serious injuries were reported. Inquiries are ongoing."
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