CHANDIGARH, June 17: A joint team comprising senior police officials from the city and district Roopnagar, last evening, sealed the Model Jail, Burail, here and conducted an anti-sabotage check to search for explosives believed to be smuggled into the jail premises.Highly-placed sources revealed that senior officials, including the SSPs of both districts and police functionaries at various levels accompanied by teams of sniffer dogs, conducted the `search' for well over three hours, begining at 4 p.m. on Tuesday. However, the teams ``found nothing,'' it was added.