Verizon opened an internal investigation on Thursday after discovering that a man wore company gear while marching at the deadly white supremacist rally in Charlottesville, Virginia, last weekend.

CEO Lowell McAdam will personally oversee the probe, he said in a companywide email that marks his first public comments on the controversy.

This has no place in our country, nor in our company, McAdam wrote.

Thats why its distressing to learn that a man who marched with members of neo-Nazi groups and the KKK was wearing Verizon gear, he added. We are actively investigating this situation and I am personally involved in getting to the bottom of this.

Verizon declined to share the photo or video that showed the marcher, and neither turned up in a search of wire service images and social media networks.

The protest became a political flashpoint this week after President Donald Trump initially refused to condemn, then later defended, the white nationalist demonstrators and said some very fine people had been among them. One rally attendee is accused of killing 32-year-old Heather Heyer by driving his car into a crowd of counterprotesters.

Verizon owns Oath, HuffPosts parent company.

McAdam did not specifically call out Trump in his short statement. The 63-year-old has remained mostly silent on the presidency, although he warned last October that Trump would be unpredictable and said the election made him want to put my head through the wall. He gave two $2,700 donations to the presidential campaign of 2016 Democratic nominee Hillary Clinton, according to data collected by the Center for Responsive Politics. He has contributed regularly to Democrats and Republicans running for Congress.