Dolores O'Riordan, lead singer of the famous band The Cranberries, died unexpectedly at the Hilton Park Lane hotel in London on Monday morning. A few days later, her family is still waiting for new information to come to light.

The Police first ruled Riordan's death as "unexplained," as she was apparently found by some hotel workers in the toilet of her room in the Hilton. Her bandmates posted in a statement that they were in London for a recording session.

James Walton, a parish priest of Ballybricken, Ireland and Riordan's close friend, told PEOPLE that her family is "devastated" when they received a phone call from the authorities confirming the singer's death Monday morning.

"It is as shocking as the death of any family would be when it's so sudden and unexpected," he said. "They are just still trying to come to terms with it. They are still waiting for information to come from England."

According to BBC, Riordan's death isn't being treated as suspicious by the Metropolitan Police, and further information about her death are being kept private at the moment. The music world was shocked upon hearing the news, with some speculating that her death was caused by her recent health problems, which caused the cancellation of most of her North American and European Tours last July.

However, three weeks before her sudden death, Dolores posted on her band's official Twitter account stating that she felt better than ever. "Hi All, Dolores here. Feeling good!" she wrote on the post. "I did my first bit of gigging in months at the weekend, performed a few songs at the Billboard annual staff holiday party in New York with the house band. Really enjoyed it! Happy Christmas to all our fans!!"

The Cranberries singer was diagnosed with depression and bipolar disorder, and have had a troubled life with eating disorders and suicide attempts following her sexual abuse when she was eight. She was survived by her three children, 20-year-old son Taylor, 16-year-old daughter Molly and 12-year-old daughter Dakota.

Her bandmates have also released a statement concerning her death, taking to Twitter to convey their grievances during this difficult time. The Cranberries produced some of the chart-topping songs in the 1990's such as "Linger and "Zombie."