President Donald Trump's long-sought military parade has rolled through the streets of Washington, but the celebration of the US Army's 250th anniversary was marred by a day of violence and discord.

A gunman posing as a police officer killed a senior Democratic state assemblywoman and her husband on Saturday in an apparent "politically motivated assassination," and wounded a second lawmaker and his spouse.

Ramesh Viswashkumar, the only known survivor out of the 242 people onboard an Air India plane that crashed in Ahmedabad, jumped out of an emergency exit, police say.

An Air India plane bound for London with 242 people on board crashed after taking off from the Indian city of Ahmedabad, and "many people" have reportedly been killed.

Disagree. Disagree. Disagree. Those were Erin Patterson's responses to the prosecution's final three questions in her murder trial.

Austrian authorities were searching on Wednesday for answers to why a 21-year-old gunman shot 10 people in a rampage at his former high school before killing himself.