(CNN) North Korea has made its second launch of projectiles this week, a senior US official tells CNN.

The official said US military intelligence tracked a new launch from North Korea on Friday morning local time (Thursday in the US). According to the initial assessment, the projectile appeared to be similar to the short range ballistic missiles fired earlier this week , the official said, referring to Wednesday's twin launches from North Korea's east coast.

A second US official told CNN that the initial assessment was that North Korea launched two short range ballistic missiles.

South Korea's military has been monitoring North Korean activity and confirmed the launch of two "unidentified short-range projectiles" from North Korea's South Hamgyong Province toward the East Sea, also known as the Sea of Japan, the South Korean Joint Chiefs of Staff said in a statement.

The projectiles were launched at 2:59 a.m. and 3:23 a.m. local time, the statement said.

Read More