The death of a man on an Irvine bike path was being investigated as a possible homicide, police said.
The man was reported injured shortly after 7 a.m. Tuesday on the path near the Los Olivos community, according to the Irvine Police Department.
When first responders arrived, they found the man dead along the path that runs along the 405 Freeway.
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Police said the man suffered injuries that led them to believe that he may have been slain.
The man was identified as 51-year-old Sidney Siemensma, a resident of Irvine.
Investigators found a bicycle next to Siemensma.
The two bike lanes stretch for miles paralleling the San Diego Freeway, a popular spot for cyclists and runners.
"A lot of joggers use that path. A lot of families go down there, a lot of bike riders," said Nasim Mashhadi.
Other residents who live nearby described the area as isolated.
"I never felt comfortable down there. It's just too secluded if you're by yourself," said Jean Henryck.
One resident of the Los Olivos residential complex said she heard a loud argument about 4 a.m.
"There was one thing I did hear - 'Let's get out of here,' basically let's go," Tatiana Ernecoff said. "Then I realized something was wrong, but then I said it's not my problem."