Shìqing hái méi chá qīngchu, dàjiā búyào luànshuō.
Nobody knows the facts yet, so everyone should keep from spreading rumours.
Tips
usage
乱 before a verb means 'carelessly, at random': 乱说 talk nonsense, 乱跑 run around, 乱花钱 waste money. 别乱说! is the usual reply to a claim you think is false or unfair; 胡说 is stronger.