By Rich McKay and Josephine Walker

ATLANTA (Reuters) - Law-enforcement officers surrounded the Fulton County courthouse on Monday in downtown Atlanta, Georgia, amid closed roads and traffic barriers put up to boost security ahead of a possible indictment of former U.S. President Donald Trump.

Fulton County District Attorney Fani Willis is wrapping up a probe of attempts to overturn his 2020 election defeat in the politically competitive state of Georgia. If he is indicted, it would be the fourth time since March he was criminally charged.

Normally bustling streets outside the gray stone courthouse were largely empty, devoid of food trucks that normally serve breakfast and lunch to court workers, most of whom Willis had urged to work remotely as a grand jury decision loomed.