NEW YORK, Dec 22 (Reuters) - A "60 Minutes" report on a Salvadoran mega-prison housing U.S.-deported migrants spread online on Monday, a day after CBS News pulled the segment before its scheduled Sunday broadcast, saying it needed more reporting.

CBS News is facing major criticism after it canceled a “60 Minutes” report on Sunday about the notorious prison in El Salvador.

CBS News' new editor-in-chief Bari Weiss is planning to create a masthead for the broadcaster as part of a broader overhaul of standards and procedures, according to a source familiar with her plans.

However, Sharyn Alfonsi, the 60 Minutes correspondent who reported the piece, slammed Weiss’ decision to pull the segment, especially since it was cleared by CBS attorneys and Standards and Practices.

Weiss told staff the piece failed to present the Trump administration’s case and would have “done our viewers a disservice” if it aired as is.

The move is sure to increase scrutiny on CBS and “60 Minutes,” which Trump sued last fall over an interview with Kamala Harris and has recently complained about stories critical of him.

CBS News pulled a "60 Minutes" report on El Salvador's CECOT prison just hours before ​its scheduled Sunday broadcast, saying it would air at a ‌future time. "The broadcast lineup for tonight's edition of 60 Minutes has been updated,

CBS correspondent Sharyn Alfonsi was harshly critical of boss Bari Weiss for delaying her segment about a El Salvador prison where the Trump administration has sent illegal migrants.

CBS News Editor-in-Chief Bari Weiss' decision to pull the segment from Sunday's episode sparked criticism, including from the correspondent behind the reporting.