A stricken cargo ship with 28 Americans on board that vanished during Hurricane Joaquin remained missing early Saturday.
Officials said there was still no sign of the El Faro, which was last heard from around 7:20 a.m. Thursday when a distress call indicated it had lost power and was taking on water.
The 735-foot vessel was bound for San Juan in Puerto Rico from Jacksonville, Florida, at the time. It was carrying 28 Americans and five Polish nationals.
Click through to see more of Hurricane Joaquin:
No sign of cargo ship El Faro in wake of Hurricane Joaquin
NASA Astronaut Scott Kelly captured this photo on Oct. 2, 2015, from the International Space Station and wrote on Twitter, "Early morning shot of Hurricane #Joaquin from @space_station before reaching #Bahamas. Hope all is safe. #YearInSpace." (Photo via NASA)
IN SPACE - OCTOBER 1: In this handout from the National Oceanic and Atmospheric Administration (NOAA), Hurricane Joaquin is seen churning in the Atlantic on October 1, 2015. Joaquin was upgraded to a category three hurricane early on October 1. The exact track has yet to be determined, but there is a possibity of landfall in the U.S. anywhere from North Carolina to the Northeast. (Photo by NOAA via Getty Images)
Major Hurricane Joaquin as seen by GOES East at 1900Z on October 1, 2015. (Photo via NOAA)
Joaquin's winds have increased to hurricane strength making the storm the third hurricane of the 2015 Atlantic hurricane season. This image was taken by GOES East at 1315Z on September 30, 2015. (Photo via NOAA)
This image shows Tropical Storm Joaquin in the Atlantic Ocean on Sept. 30, 2015. (Photo via NOAA)
This image shows Tropical Storm Joaquin in the Atlantic Ocean north of Hispaniola, taken by GOES East at 1415Z on September 29, 2015. (Photo via NOAA)
Tropical Storm Joaquin on Sept. 29, 2015. (Photo via NOAA)
Tropical Storm #Joaquin =Max sustained winds 70 mph. Should become hurricane. Track still uncertain beyond Friday. http://t.co/MxTpVLrHXG
BREAKING: #Hurricane warning issued for central Bahamas. Hurricane watch issued including Nassau, Freeport. #Joaquin http://t.co/8pAQ9iQvxP
#Joaquin is still a #tropicalstorm for now. You can track the latest here --> http://t.co/CWPOQvTLcT @CNN http://t.co/le9bxXlyh1
Tropical Storm #Joaquin likely to become a hurricane today. Stays near Bahamas thru Friday, then heads north #nlwx http://t.co/VluYOAv88v
Tropical Storm Joaquin continues to strengthen. Forecast to become a hurricane today @foxandfriends @FoxFriendsFirst http://t.co/8qNEuurFDt
The track and intensity continue to be fine tuned, but details are still unclear on Joaquin's impacts. #PAWX #FOX43 http://t.co/YuofedVmzu
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Around 850 square nautical miles were searched on Friday and the effort resumed at dawn Saturday.
Anthony Chiarello, president and CEO of ship owner TOTE, said late Friday that he had met with the crew members' families.
"Our number one priority ... is the safe return of the 33 people on the vessel," he told a press conference.
Chiarello said the firm was working with the coast guard and that everything "humanly possible" was being done to find and recover the ship.
WATCH: Fly into eye of Hurricane Joaquin:
The El Faro had lost propulsion and was listing at 15 degrees when it was last heard from. At the time, its crew said the vessel had taken on water but all flooding had been contained, the coast guard said.
TOTE said the majority of the Americans aboard were based around Jacksonville, Florida.
Joaquin remained a Category 3 hurricane early Saturday and by 5 a.m. ET was centered about 120 miles northeast of San Salvador, Bahamas, and about 700 miles southwest of Bermuda. It had maximum sustained winds of 125 mph and was moving northeast at 13 mph.