The first incident happened at Waterloo Close in Hightown at 22:00 BST followed by others nearby.
No one was injured.
Police are investigating the "extremely serious incident".

Norwich Crown Court was told Malcolm Blissett changed a foster carer's records over a two-year period.
He had been told to remove any material that "incriminated carers".
Leia Dowsing, of Suffolk Police, said most changes were in fact to spelling, grammar and punctuation but documents should not have been altered.
She told jurors words had also been changed, chunks of test were missing and questions to the children had been removed from the record.
The court heard Mr Blissett had been told to ensure all reports were "grammatically correct with no spelling mistakes and there was nothing that incriminated the carers".
"That is what he told me," said Miss Dowsing, who added that making such changes was "entirely wrong".
Ann Cotcher QC, defending one of the accused, Michael Rogers, said: "The majority of changes were not really relevant.
"Some were punctuation, some were spelling; changes or restructuring of sentences; removal of words; addition of words, and there was removal of leading questions."
The abuse is said to have been carried out against two boys and three girls in and around Norwich and London.
The defendants are Marie Black, 34, from Norwich; Mr Rogers, 53, from Romford, Carol Stadler, 59, Anthony Stadler, 63, Nicola Collins, 36, Andrew Collins, 52, Judith Fuller, 32, Denise Barnes, 34, Kathleen Adams, 84, and Jason Adams, 43, all from Norwich.
All deny all the charges they face, except Mr Adams, who admits four of five child cruelty charges.
The trial continues.
Six cars have been set alight in Wrexham overnight, say North Wales Police.
[NEXT_CONCEPT]
A social worker made more than 250 alterations to the accounts of children making sexual abuse allegations against 10 people, a court has heard.