Hollywood star Bill Murray has been arrested on suspicion of drunk driving in a golf cart in the Swedish capital Stockholm. The actor was stopped by police in the early hours of Sunday and alcohol was smelled on his breath, according Stockholm police detective inspector Christer Holmlund. Holmlund says, "He refused to blow in the (breath test) instrument, citing American legislation. So we applied the old method - a blood test. It will take 14 days before the results are in." Murray - who is in the city attending a golf tournament - signed a document admitting driving under the influence and permitted a police officer to enter a guilty plea on his behalf if the case goes to court. The 56-year-old will only be charged if his blood alcohol level is higher than the legal limit. If it is excessively high he could face a prison sentence - but a fine is more likely. Holmlund adds, "There were no obvious signs, like when someone is really tipsy." The officer claims mystery surrounds the golf cart and who owns it - although Murray isn't facing theft charges: "It was a golf cart. How it ended up in this predicament I don't know. I have done this since 1968 and I've never experienced anything like this."