England's Paul Casey and Tommy Fleetwood and Brian Harman and Brooks Koepka of the United States all find themselves on seven-under par for the tournament.

Casey produced a one-under par 71 today while the other three players carded two-under 70s in their second rounds.

After opening with a six-under 66, Casey was one off the overnight lead as he started on the 10th hole today.

He birdied the 11th but bogeyed the 12th before scoring a devastating triple-bogey eight on the 14th.

Another bogey dropped him to two under but his five birdies allowed him to top the standings.

Fleetwood bogeyed his first hole of the day but had three birdies and 12 pars.

He dropped a shot on the 17th but finished strongly with a birdie at the par-five 18th.

Rickie Fowler of the US was alone at the top of the standings overnight and was nine under for the tournament until three successive bogeys from the 11th saw him fall to joint fifth at six-under.

For the first time since world rankings began in 1986, the world's top three have all missed the cut at a major tournament.

Defending champion Dustin Johnson of the US, Northern Ireland's Rory McIlroy and Australia's Jason Day finished above the one-over par cut.

Johnson finished on four-over, McIlroy on five-over and Day on 10-over.

Rio 2016 Olympic champion Justin Rose, the 2013 US Open winner, is another to exit the competition prematurely after he finished on two-over for the tournament.

Japan's Hideki Matsuyama posted the joint-lowest round of the day, a seven-under 65 to move into a tie for eighth.

The world number four scored six birdies on the front nine and one more on the back nine.

Masters champion Sergio Garcia kept his challenge on track with a one-under-par 71. 

Action is due to continue tomorrow with the major concluding on Sunday (June 18).