Twitter said it will start laying off employees on Friday, according to a memo sent to staff, with several workers filing a lawsuit alleging the move by new owner billionaire Elon Musk violates US labor law. A company-wide email seen by AFP says Twitter employees will receive word via email at the start of business Friday, California time, as to what their fate is. It does not give a number but the Washington Post and New York Times reported that about half of Twitter’s 7,500 employees will be let go. “In an effort to place Twitter on a healthy path, we will go through the difficult process of…