Police ask that anyone with information about her whereabouts to contact Lt. Todd Bernard by emailing toddbe@southportland.gov or by calling 207-874-8575.
The remains of 42 people had been pulled from the river by Saturday afternoon, including 38 that had been positively identified, according to emergency officials.
Rubio's first stop on the five-nation tour Saturday will be Panama, whose president, José Raúl Mulino, says there will be no negotiation over the canal.