There's been an accident.

Meaning

An unexpected, unfortunate incident has occurred.

Examples

• John: I'm sorry to inform you, but <b>there's been an accident</b>.
• Alice: Oh my goodness, what happened?
• John: A car crash near the office. <b>There's been an accident</b> and police and paramedics are on the scene.
• Alice: I hope everyone is okay.