Mick Mulcahey of Strathclyde police has provided some technical detail of the site and the scale of the damage inflicted by the explosion.
Mulcahey says the three people arrested in connection with the explosion are all from Glasgow. That matches police information provided earlier.
The force said the three were being held at Dumbarton nick. The police said in a separate statement that two men would be charged with attempted murder but later a third man will also be charged with attempted murder and two lesser charges.
Those charges relate to two men that were injured in the explosion in block of flats in the Mount Vernon area of Glasgow. The third man has also been arrested for explosives offences.
The police’s statement said:
Officers will be continuing to carry out thorough searches of the area in connection with these offences. We have advised residents to remain vigilant.