Elias Rodriguez, a 31-year-old Chicago resident, was charged in the deaths of a young couple. Moments after a burst of gunfire was heard outside the Capital Jewish Museum in downtown Washington on Wednesday night, a breathless man in a blue suit rushed into the building.

The gunman allegedly opened fire outside a Wednesday-night event at the Capital Jewish Museum and afterward shouted “Free Palestine.”

The authorities said the shooter was motivated by opposition to the war in Gaza when he killed two young Israeli Embassy employees in Washington.

Investigators have seized writings that they believe belong to the suspect as they search for a motive in the fatal attack.

The FBI hauled boxes of evidence from the Albany Park home of the man charged with killing two Israeli Embassy employees in Washington D.C. Wednesday night.

The man and the woman were shot dead outside the Capital Jewish Museum near Penn Quarter, Washington DC, and police have warned members of the public to avoid the area