Martinez man arrested after allegedly attacking victim with a knife at Orinda BART station

BART police arrested a Martinez man late Tuesday night who allegedly stabbed a victim at the Orinda BART station, authorities said. 
BART police said the victim suffered a wound to his upper arm at approximately 11:58 p.m. but is expected to survive.
The @SFBARTalert account on X posted about a delay on the Antioch line due to police activity at around 12:10 a.m. Those delays persisted for about 25 minutes.
Police said they arrested a suspect — 50-year-old Martinez resident Greig Jentons — and took him to the Martinez Detention Facility. 
Authorities did not provide any details regarding what led up to the incident.