POLICE and fire officials have launched an investigation after an arson attack on a warehouse in Crewe.
The incident at Repcliffe Chemicals, Macon Way, left two firefighters needing hospital treatment for irritation to their eyes, skin, faces and hands.
Residents in homes nearby were advised to keep their windows shut after smoke was reported billowing from the site shortly after midnight on Saturday.
Firefighters tackled flames of up to 15ft at the warehouse and temporary cabin at the back of the company's offices.
Crewe Fire Station commander Carl Hanson said: 'The warehouse was used for storing isopropanol, a sub-stance used in screen wash.
'Fortunately it was a 50% mix with water making it less flammable.
'A 30 metre by five-metre area of building was well alight, giving off plumes of smoke.
'Decontamination procedures were set up but two officers were taken to Leighton Hospital with irritation. They have now returned to work.'
Units from Crewe, Middlewich, Nantwich and Sand-bach attended as well as the hazardous material unit from Crewe.
A Cheshire police spokesman said: 'The incident is being treated as suspicious. We would like to hear from anyone who may have seen suspicious activity between 10pm and midnight.'
* Anyone who can help is asked to call detectives on 01244 613333.