Five stories to know for May 17: Israel-Gaza fighting continues, Los Angeles blaze, train derails in Iowa, CDC mask guidelines, and coronavirus in India.

1. Israel bombed what it said were underground tunnels used by Hamas and Palestinian militants fired rocket barrages at Israeli cities as fighting spilled into a second week.

2. A wildfire in Los Angeles, California, gained momentum on Sunday and about 1,000 residents were put under evacuation orders. Two suspects were detained as arson investigators and police looked into the cause of the blaze.

3. A Union Pacific train hauling hazardous materials derailed and then caught fire in the city of Sibley, Iowa, authorities said.

4. New U.S. guidance allowing people to go without masks in most places provided one more topic of disagreement among Americans who have found little common ground throughout the pandemic.

5. India reported a further decline in new coronavirus cases on Monday but daily deaths remained above 4,000, and experts said the data was unreliable due to a lack of testing in rural areas where the virus is spreading fast.