A rabbi who was among four people held hostage at a Texas synagogue said Sunday that the British man who held them captive became “increasingly belligerent and threatening” toward the end of the 10-hour standoff.

Rabbi Charlie Cytron-Walker of Congregation Beth Israel, near Fort Worth, credited security training that his congregation has received over the years for helping him and the other hostages get through the situation. He said in a statement that without that instruction, “we would not have been prepared to act and flee when the situation presented itself.”

Authorities on Sunday identified the hostage-taker as a 44-year-old