A fire spreading through the wilderness of San Diego County near the U.S.-Mexico border exploded to more than 500 acres within several hours on Thursday night. But the blaze, known as the Border 2 fire, was miles from any structures or homes, and firefighters said they were making progress controlling it.

Two hikers in California’s Jacumba Wilderness were attacked and robbed by suspected Mexican cartel members this week, including a U.S. citizen who was shot in the leg, officials said. At around 11 a.m.

Border officials say the attack bolsters President Donald Trump’s claims that the U.S.-Mexico border is more lawless than official statistics indicate.