The father of a 16-month-old boy who had a large live firework deliberately thrown into his shop has said his son wakes screaming.
A man in a cloak and skeleton-type mask entered California Wines shop on Tonge Moor Road, Bolton, Greater Manchester, carrying the firework on Monday night.
Police have identified the explosive as an Annihilator 500 Shot Repeater and said it would cost about £40 to buy.
Any retailers who have sold one recently are asked to call the police.
Shopkeeper Hoam Dimh kicked the large firework into the porch after it was thrown into his shop.
The firework then went off, firing about 500 rockets in a small, confined space.
He suffered minor burns to his hands and his young son, who was in the flat above the shop, was taken to Royal Bolton Hospital as a precaution after vomiting due to smoke inhalation.
Mr Dimh said: "I'm very scared. My wife is shocked. I have lived here seven years and nothing like this has happened before.
"My son is well now but sometimes he screams."
Insp Tony Kenyon said: "This firework is much larger than normal fireworks and would probably retail for anything between £40-£50.
"I would urge any local retailers who sold this item to anyone in the last few weeks to contact officers as soon as possible so we can continue our investigation."
He added that the CCTV footage of the incident had generated a good response from the public.