The incident happened less than 48 hours after another multiple fatality in Jersey when a freight ship collided with and sank a local trawler off the island's west coast with three lives lost.

[1] The explosion occurred in a three-storey block of flats on Pier Road, which is located on the eastern shore of St Helier's harbour on the south side of the town.

[2] At 3:53 a.m.[3] GMT on 10 December 2022, a suspected gas explosion occurred at 27-32 Haut du Mont,[3] a three-storey block of flats on Pier Road in St Helier, Jersey.

[4] On 11 December, Jersey police ceased search and rescue efforts, with the remaining missing presumed dead.

[17] On 25 December there was a tenth fatality when a woman living at 35 Haut de Mont, a neighbouring flat who had been injured by the blast died in hospital.

In September 2022, Andium asked Island Energy to disconnect the redundant supply from the mains network[23] after the last tenant in a different apartment block in the Haut du Mont development switched to an electric cooker.

A trench where gas engineers had been working before the incident in the street below Haut du Mont was subject to a police cordon but Smith said this was not part of the investigation.

[28] The police reported in August, nine months after the explosion, that there were 21 officers working full time on the investigation, 708 statements had been taken and 1,307 lines of enquiry had been pursued as part of Operation Spire.

[28] In February 2025, three former Island Energy workers, Neil Armstrong, Lee Ward, and John Wright, were each charged with ten counts of gross negligence.

[5][21] Two people suffered minor injuries and were described as "walking wounded", undergoing treatment at the Town Hall before being eventually hospitalised and released later the same day.

[2][10] An adjacent block of flats was at risk of collapse due to explosion damage and had to be made safe by local contractors.

A minute's silence was held at football and sports games in Jersey and a candlelit vigil took place at the Town Church.