San Francisco (KRON) — BART is confirming that there is a 10 inch piece of broken track in San Francisco. Delays will persist throughout the day.

BART commuters are encouraged to seek alternate methods of transportation.

Officials now estimate that repairs to the broken rail will be completed by 4 p.m., in time for the afternoon commute.

The problem was discovered shortly after 9:30 a.m. on the eastbound trackway between the Civic Center and 16th Street Mission stations, BART officials said.

BART trains are single-tracking through all downtown San Francisco stations. Also trains traveling from the East Bay to the city are limited, according to BART.

Only San Francisco International Airport-bound trains are running past Montgomery station in San Francisco, BART spokeswoman Alicia Trost said.

Trains that normally run from Fremont to Daly City are stopping at the MacArthur station in Oakland, trains from Dublin to Daly City are turning around at Montgomery, and no trains are running directly from Richmond to San Francisco, Trost said.

Passengers on any of those trains will have to off-board at those stations and continue on an airport-bound train, according to Trost.

San Francisco Municipal Railway and Alameda-Contra Costa Transit are honoring BART tickets today.

The repairs are expected to take 5-6 hours and cause major delays into the evening commute.