A BBC News update at 11:38
We've just heard from the Clapham South Belvedere Hotel - which sits on the corner of Lessar Avenue, where last night's alkaline attack took place.
They say that at 19:25 last night, "police and ambulance services were called to attend a serious incident in which guests at the Belvedere Hotel were a victim".
It's not clear which people caught up in last night's attack were guests of the hotel.
A statement continues:
Quote Message: Belvedere Hotel staff, having supported the work of the emergency services, provided assistance to the guests affected and sought to reassure other hotel guests as to their safety and wellbeing.
Belvedere Hotel staff, having supported the work of the emergency services, provided assistance to the guests affected and sought to reassure other hotel guests as to their safety and wellbeing.Quote Message: The staff team will continue to provide assistance to guests and the police going forward. As this is an ongoing police investigation, we are not able to provide any further comment.
The staff team will continue to provide assistance to guests and the police going forward. As this is an ongoing police investigation, we are not able to provide any further comment.Quote Message: Our thoughts are with the family and friends of those affected."
Our thoughts are with the family and friends of those affected."