SEOUL, South Korea — North Korea fired two suspected short-range missiles toward the sea on Thursday, South Korean officials said, its second weapons launch in five days and a possible warning that nuclear disarmament talks with Washington could be in danger.South Korea’s Joint Chiefs of Staff said the weapons flew 260 miles and 167 miles, respectively. It said it is working with the United States to determine more details, such as the types of weapons that were fired. South Korea’s military said earlier that at least one projectile was launched from the Sino-ri area of North Pyongan province, an area known to have one of North Korea’s oldest missile bases where a brigade operates mid-range Rodong missiles. It later said there were two launches from the nearby town of Kusong, where North Korea conducted its first successful flight tests of its Hwasong-12 intermediate-range missile and Hwasong-14 intercontinental ballistic missile, both in 2017.Kusong is also home to missile test facilities that were critical to the development of North Korea’s solid-fuel Pukguksong-2, which was successfully flight-tested for the first time in February 2017, in the North’s first missile test after President Donald Trump took office.The latest launches came as U.S. Special Representative…