Twitter has said that there is “no evidence” that attackers obtained user account passwords after its security breach on Wednesday, which forced the company to lock down user accounts to prevent verified users from tweeting. In a series of tweets on Thursday — almost exactly a day after the mass account hijacking started — the social media giant said: “We have no evidence that attackers accessed passwords. Currently, we don’t believe resetting your password is necessary.” “Out of an abundance of caution, and as part of our incident response yesterday…