KAUFMAN, Texas (AP) — An assistant district attorney was shot and killed Thursday morning near the North Texas county courthouse where he worked, and authorities said they were searching for two suspects.

The shooting occurred just before 9 a.m. outside the Kaufman County Courthouse annex, which is across the street from the main county courthouse about 33 miles southeast of Dallas. Officials didn't immediately indicate any motive for the shooting.

Kaufman Independent School District Superintendent Todd Williams said all schools in the district were placed in lockdown as authorities searched for the suspects, and officials eventually decided to close the buildings for the day.