Sen. Elizabeth Warren (D-Mass.) on Thursday said she is disgusted by footage of two black men being killed in separate encounters with police.

We’ve seen the sickening videos of black Americans killed in traffic stops. Lives ended by those sworn to protect them. #blacklivesmatter

— Elizabeth Warren (@SenWarren) July 7, 2016

Sandra Bland. Freddie Gray. Michael Brown. Walter Scott. Tamir Rice. Eric Garner. Now Alton Sterling & Philando Castile. #blacklivesmatter

— Elizabeth Warren (@SenWarren) July 7, 2016

{mosads}Warren said the pair of fatal shootings this week — one in Baton Rouge, La., the other in Falcon Heights, Minn. — shows the glaring divide between law enforcement and minority communities.

Most cops are good ppl. But we can’t ignore the ugly reality: black parents feel they must teach kids to “survive” police. #blacklivesmatter

— Elizabeth Warren (@SenWarren) July 7, 2016

We can’t ignore the ugly reality: black parents are terrified that teaching kids to “survive” the police won’t be enough. #blacklivesmatter

— Elizabeth Warren (@SenWarren) July 7, 2016

Warren added that such fatal confrontations should inspire Americans to help their black neighbors feel safer in the U.S.

#blacklivesmatter must be more than a hashtag or trending topic every time a tragedy happens. We must all come together to make it true.

— Elizabeth Warren (@SenWarren) July 7, 2016

Alton Sterling, 37, died early Tuesday after being shot by police at a convenience store.

{mosads}Philando Castile, 32, was shot and killed Wednesday in an incident involving a traffic stop.

Their deaths have sparked national outrage after the release of graphic videos capturing their deaths and the aftermath.

Louisiana Gov. John Bel Edwards (D) on Wednesday announced that the Department of Justice’s civil rights division will investigate Sterling’s shooting.

Rep. Betty McCollum (D-Minn.) on Thursday called for a similar federal probe into Castile’s death.

President Obama said on Facebook that, “all Americans should be deeply troubled” by the two unrelated incidents. He flew to Poland on Thursday evening and is scheduled to speak from there at 6:35 p.m. EDT.

“We’ve seen such tragedies far too many times,” he wrote in a Facebook post earlier in the day. “Let’s come together as a nation, and keep faith with one another, in order to ensure a future where all of our children know that their lives matter.”