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At least four people were hospitalised in the aftermath of the incident at the Immaculate Conception Church in Clondalkin at 10.20am.
Gardaí have been granted an extra 48-hours to forensically examine the home.
The junction is one of the busiest in the country with approximately 80,000 vehicles using it each day.
A man was arrested after a motorcycle was seen leaving the scene.
A local group has said that there is a medieval gable wall at one of the houses but the council said there is not yet sufficient evidence of this.