South Korea has raised its terror warning levels by two levels from “caution” to “alert” at five foreign missions due to increased risk of attacks on them by North Korea, the Seoul government said on Thursday. The “alert” level is the third highest of the four-level system and means that “the possibility of a terrorist attack” is classified as high, the government said. The move is in response to intelligence indications that showed that North Korea could attempt to cause damage to South Korean embassies in Cambodia, Laos and Vietnam as well as the to consulates general in Vladivostok in Russi…