LISBON, Portugal (AP) — The derailment of a streetcar that is a popular tourist attraction in Portugal's capital killed 16 people and injured 21 others, emergency services said . Police said that 11 of those killed were foreigners.

Officials called the accident one of Lisbon's worst tragedies in recent memory.

Here's what to know: Investigations underway and wreckage removed

Official details about the crash in downtown Lisbon were still scant Friday, but details were beginning to emerge about those killed in the accident.

Multiple agencies are investigating what Portugal’s Prime Minister Luis Montenegro has described as “one of the biggest tragedies of our recent past.”

The government’s Office for Air and Rail Accident Investigations said it would issue a preliminary technical rep

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