CBS News reports (Jun 26) that the FBI and Department of Homeland Security had issued a bulletin warning of possible attacks. The outlet notes that the bulletin is unrelated to the attacks in France, Tunisia and Kuwait.

The bulletin comes as DHS Sec. Jeh Johnson encourages vigilance over the July Fourth holiday in the wake of June 26 attacks abroad.

“Particularly with the upcoming July 4th holiday, here in the United States the Department of Homeland Security and the FBI continue to communicate with state and local law enforcement about what we know and see,” Johnson said in a statement voicing support for the people of France, Tunisia, and Kuwait following the terrorist attacks in those countries.

“We are encouraging all law enforcement to be vigilant and prepared. We will also adjust security measures, seen and unseen, as necessary to protect the American people,” he added.

Johnson continued on to encourage people to celebrate the Fourth of July but keep an eye out for trouble, saying “‘If You See Something Say Something™’ is more than a slogan.”

He concluded with a note about the recent gunman attack on a Charleston church that killed nine and President Obama’s appearance at the funeral of one of the victims, Reverend Clementa Pickney.

“In our great country, acts of mass violence will never divert, discourage or frighten us,” he said, “Today President Obama eulogizes the Reverend Clementa Pickney in Charleston. The alleged killer sought to divide us. Instead, his actions appear to have had the opposite effect in South Carolina, where people of different races have come together to denounce the tragedy and mourn those killed.”