U.S. House Oversight and Reform Chairman Elijah Cummings, a key figure in the Democrats¡¯ impeachment inquiry and a fierce critic of President Donald Trump, has died, AP reported.

Cummings, 68, passed away Thursday at Johns Hopkins Hospital due to complications concerning long-standing health challenges, AP reported, citing a statement from his office.

The Maryland congressman¡¯s death comes as he was chairing one of the three panels that has been leading the House impeachment investigation focusing on Trump¡¯s Ukraine activities.