* Missiles flew about 200 km into sea off east coast - S.Korea

* Launch is fourth by Pyongyang in four weeks

* S.Korea holding off installing new anti-missile components (Adds analyst comments pars 5-7, details on THAAD pars 12-13, quotes from official par 18)

By Ju-min Park and Soyoung Kim

SEOUL, June 8 (Reuters) - North Korea fired what appeared to be several land-to-ship missiles off its east coast on Thursday, South Korea's military said, the latest in a fast-paced series of missile tests defying world pressure to rein in its weapons programme.

The launches come less than a week after the United Nations Security Council passed fresh sanctions on the reclusive state, which said it would continued to pursue its nuclear and missile programme without delay.

It also comes a day after South Korea said it will hold off on installing remaining components of a controversial U.S. anti-missile defense system that has angered North Korea's main ally, China.

The missiles were launched Thursday morning from the North Korean coastal city of Wonsan and flew about 200 km (124 miles), South Korea's Office of Joint Chiefs of Staff said in a statement.

Under third-generation leader Kim Jong Un, North Korea has been conducting missile tests at an unprecedented pace in an effort to develop an intercontinental ballistic missile (ICBM) capable of hitting the mainland United States.

Compared to the different types of ballistic missiles Pyongyang has recently tested, the missiles launched on Thursday are considered to be more defensive in nature, designed to defend against threats such as enemy warships.

North Korea unveiled a number of new weapons at a massive military parade on April 15 to mark the birth anniversary of the state's founding leader and has since tested some of them.

"Looking at North Korea’s pattern of missile launches, it has been revealing what it brought to the recent military parade," said Kim Dong-yub, a military expert at Kyungnam University’s Far Eastern Studies in Seoul. "What appeared to be a new type of land-to-ship missile equipped with four launching canisters was unveiled at the parade. I think this might be what was used today."

THAAD DEFENCE DELAYED

South Korean President Moon Jae-in has been briefed on the latest launch, the military said, declining to give further details.

Thursday's launch is the fourth missile test by North Korea since Moon took office on May 10 pledging to engage in dialogue with Pyongyang, saying sanctions and pressure alone have failed to resolve the growing threat from the North's advancing nuclear and missile programme.