A woman has died in an attempt to illegally enter the United States by swimming around the end of the barrier along the California-Mexican border, federal officials said. Border patrol agents were notified just after 11:30 p.m. Friday that a group of possibly 70 people was trying to swim from Tijuana, Mexico into the United States at Border Field State Park in San Diego County, according to the U.S. Customs and Border Protection. One responding agent found a single, unresponsive woman later believed to be from the same group of swimmers, officials said. The agent immediately performed CPR on the woman and called in emergency medical support, who arrived at the scene, continued medical aid, and declared her dead at about 12:30 a.m. The woman wasn’t immediately identified. Border Patrol said they worked with other federal and state agencies, including the U.S. Coast Guard and San Diego Fire Department, to …