Monterey Park shooting: what we know so far

At least 10 were killed at a Los Angeles-area dance hall, with the motive for the attack still unclear

At least 10 people have been killed in a shooting at a dance hall on Saturday night in a city close to Los Angeles, on the eve of the lunar new year.

Here's what we know, and what we still don't know, about the deadliest US mass shooting in recent months.