A California farmworker died on Friday from injuries sustained a day earlier when U.S. immigration agents raided a cannabis operation and arrested hundreds of workers, according to a farmworker advocacy group.

Protesters blocked the roads in and out of one of the farms, and at one point federal agents drove their vehicles through the fields.

The Los Angeles Fire Department rushed to Wilmington after a tunnel collapsed and trapped at least 15 people inside. Authorities have not been able to contact the people trapped inside. The tunnel collapse appeared to damage communication lines.

A massive tunnel under construction partially collapsed in Los Angeles County, trapping 31 workers 400 feet beneath the ground. All the workers were safely rescued.