LOS ANGELES, July 13, 2018 (News Wires) - Twitter Inc's top executive didn't slide by unscathed in the social-media site's crackdown on fake followers. Jack Dorsey, chief executive officer and co-founder, said in a tweet that he lost 200,000 followers, bringing his total down to four million, after Twitter made good on its pledge to remove suspicious accounts. On Wednesday, Vijaya Gadde, Twitter's head of legal, policy, trust and safety, said the company would begin removing "locked accounts from follower counts across profiles globally. As a result, the number of followers displayed on many profiles may go down." Locked accounts are those identified to have involved sudden suspicious changes in activity. In his tweet Thursday, Dorsey said, "Action on this starts today." The company recently said it's identifying almost 10 million dubious accounts a week and is putting all accounts through a security check. The Washington Post reported last week that Twitter has suspended more than one million accounts a day in recent months, and the rate has more than doubled since October, when the company, under congressional pressure, revealed how Russians used fake accounts to manipulate the US presidential election. Twitter shares fell 5 per cent on Monday on concern that removing millions of fake accounts would impede user growth. The stock gained 3.2 per cent.