At least four terrorists were holed up in the Taj Hotel where 40 to 50 guests were still trapped, a senior army officer said here on Thursday. "In this area there are four to five terrorists," Major R K Hooda, General Officer Commanding of Maharashtra, Goa and Gujarat said. There are an estimated 40 to 50 guests still trapped in the hotel, he said. There were multiple explosions and gunfire at the Taj Hotel in south Mumbai in the wee hours and NSG commandos have lauched an operation to flush out the ultras. Many of those trapped in the hotel since Wednesday night were rescued early Thursday morning.