A 22-year-old woman who had acid thrown in her face is being treated in a specialist burns unit for "serious facial burns," police have said.
A 48-year-old woman has been arrested on suspicion of causing grievous bodily harm in the attack, which happened in Sandown on the Isle of Wight in the early hours of yesterday.
A spokeswoman for Hampshire Constabulary said, "Police believe this is an isolated incident and are not looking for anyone else in relation to this attack."
A 24-year-old woman, arrested on suspicion of assisting an offender, has been bailed until next week pending further inquiries.
The Met Office said gusts of wind have reached 99mph at Needles Old Battery on the Isle of Wight:
Current maximum wind gust recorded at 5am is 99mph at Needles Old Battery - Isle of Wight. ^TLH
Revellers have avoided muddy conditions so far despite occasional light showers as Bestival enjoys its 10th anniversary party.
Police have said that they are "keeping an open mind" after the search for two boys reported missing on the Isle of Wight was cancelled.
The force is keeping an open mind about the circumstances of this report. There is no evidence at this time to confirm a criminal offence has been committed deliberately. There could be a completely innocent explanation for what happened. Nothing can be ruled out as we assess all the information available.
We are renewing an appeal for the parents or any relatives of these two boys to contact the police.
The Coastguard has said that reports of two missing boys were "either a hoax or a false report."
It is an area we can search very well with clear visibility.
We are confident there is no child out there in difficulty.
Either it was a hoax or a false report. The parents left the scene after making the report. Did they find the children and then leave without telling anyone?
A Coastguard spokeswoman said they were hoping to get in contact with the parents of the two boys.
She said: "We would like to hear from the parents to confirm that the children are, in fact, safe."
It is understood that the boys were reported missing at midday but the parents had not been in contact with the emergency services since about 1pm.
The Coastguard have tweeted to say that they have stood down their search for two young boys on the Isle of Wight:
We've searched the sea and shore and we now don't think there are 2 kids in danger. Search stood down. Thanks to everyone for their help.
In an interview with a local radio station on the Isle of Wight, Maggie Hill from the Maritime and Coastguard Agency has appealed for the parents of the boys reported missing to get in touch.
You can listen to the interview here.
Coastguard and police are searching for two young boys who have gone missing from a popular tourist beach on the Isle of Wight.