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The MBTA’s general manager had a weird morning on Twitter

MBTA general manger Luis Ramirez on the Red Line. –David L Ryan/Globe Staff

Days after deleting a pair of controversial tweets, the general manager of the Massachusetts Bay Transportation Authority briefly went underground on Twitter, preventing unapproved followers from reading his account, before resurfacing Tuesday morning.

Luis Ramirez, who became general manager in September, had set his account to private by Tuesday morning, meaning Twitter users could not follow him unless he approved them first.

He had also “blocked’’ several reporters and advocates who closely monitor the agency, meaning they would not be able to see his messages even if they were open to the public, and he could no longer follow them.