Jared and his wife Heidi Nunes were celebrating their first wedding anniversary with a European tour.
A picture taken moments shortly the attack depicts a happy couple enjoying sangrias on the promenade.
She said she has reached out to the USA embassy in Spain for help and has called local hospitals searching for him.
"Next thing I know there's screaming, yelling", Nunes told NBC. A spokesperson for the Jared and Heidi Nunes Tucker family issued a statement: "At present Jared's wife Heidi is not issuing a statement and will issue a formal statement tomorrow". "I got pushed inside the souvenir kiosk and stayed there hiding while everybody kept running by screaming, and then the police eventually made us evacuate". Tucker said his daughter would fly to Barcelona to help make arrangements.
"We're waiting for a list at the emergency places we're at but the lists don't seem to be updated very rapidly", she told NBC News. Nunes also said she is aware of a picture that's been circulating which appears to show her husband injured, but being helped by someone. I don't know how we're going to do it.
USA tourist celebrating his first wedding anniversary killed in Barcelona terror attack
The U.S. State Department did confirm that one U.S. citizen "suffered minor injuries", but the person was not named.
A Bay Area woman is desperate to find her husband, who she said is still missing in Barcelona after what authorities have called a terrorist attack.
One friend, Danny Gomez, told KTVU that Tucker owns a pool company in Martinez that he runs with his father, and his wife is a sixth grade teacher at El Sobrante Christian School. "For now, she asks that the community and media hold their family up in prayer and asks for the privacy during this hard time".
"Everything seemed out of control", Ochoa said. Police have arrested four people in connection with the terror attacks in Barcelona and Cambrils. The incident occurred at around 5 p.m. local time Thursday when a van, allegedly driven by a member or supporter of ISIS, drove onto a promenade in central Barcelona and plowed into hundreds of people.