A landslide prompted the closure of 9th Street Beach in the city of Laguna Beach Friday morning. The landslide was reported around 7:15 a.m. after a portion of the cliff tumbled down onto the beach, which is also known as Thousand Steps Beach. A portion of the iconic steps frequently used to get down to the beach were also wiped away. City officials said the beach would remain closed until further notice. It’s unclear what caused the landslide, but city officials said there is no threat to neighboring properties or safety. Geologists will asses the landslide and bluff…