At least 4 under 59, 10 under 59:30.
Update from LRC . Here are the top 10 results.
1 Abraham Kiptum (KEN) 58:18
2 Jemal Yimer (ETH) 58:33
3 Abadi Hadis (ETH) 58:44
4 Amdamlak Belihu Berta (ETH) 59:19
5 Stephen Kiprop (KEN) 59:21
6 Bernard Kipkorir Ngeno (KEN) 59:22
7 Simon Cheprot (KEN) 59:28
8 Abel Kipchumba (KEN) 59:29
9 Mangata Ndiwa (KEN) 1:00:01
10 Teshome Mekonen (ETH) 1:00:02
Additional pdate from LetsRun.com
Kenya's Abraham Kiptum, 29, this morning broke Zersenay Tadesse's 58:23 half marathon world record in Valencia, running 58:18. You can see the IAAF recap below but he ran a big negative split, running his first 10k in 28:02 with the pack before taking off and running his 2nd in 27:16.
The race was extremely fast as 8 men broke 59:30, the most in history (the previous high was 6). We will note that everything is subject to verification (the race broadcast initially published some incorrect results with 10 breaking 59:30)
Kiptum's tilastopaja.org profile is fascinating. He's 29 but doesn't show up until 2015 when he ran a 2:11:36 marathon for third in Rabat.
In 2016, he focused on the half, running 61:52 at Madrid and then 59:36 for 6th in Copenhagen. He also picked up an xc win in Kenya in October.
In 2017, it was a tale of two halves with the first part being mediocre and the 2nd spectacular. He started the year with a couple of xc wins in Kenya. Then he picked up a 2:15:23 marathon win in Lagos - that was in February. In April, he ran a 29:18 10k at altitude (5th place) before finishing 7th in 2:14:38 at the Dongying Marathon in China.
The 2nd half of the year was spectacular, however. He ran a 60:06 pb in the half in September in Portugal (Porto, winning) before running a 2:05:26 in Amsterdam (3rd).
This year, as he was getting ready for the Daegu marathon he ran a 63:48 half in Granlers Spain (7th place) before winning Daegu in 2:06:29 on April 1st. Since then, he'd run a 63:02 half (win in July), a 59:09 runnerup showing in Copenhagen on September 16th before most recently finishing second on October 13h in an xc race in Ndalata in 31:24. In that race two weeks ago, he got smoked by 32 seconds. But the guy who smoked him was Rhonex Kipruto - the 2018 world junior champ who has been on fire this year and run 26:46 on the road this year.
If we were Rhonex Kipruto's agent, I'd get him in a half right now.
IAAF recap of race is here: https://www.iaaf.org/news/report/world-half-marathon-record-valencia-kiptum