A Spanish passenger plane crashed on takeoff from Madrid's Barajas International Airport Wednesday. According to the airport authority and local media reports, the Spainair plane shot off the runway at Terminal 4. El Mundo newspaper reported that 150 people have died, and another 20 are believed critically wounded.

The newspaper reported that, so far, between 20 and 30 people have been evacuated from the plane, some of them in critical condition. One of the people wounded is now believed to have died on the way to the hospital. At La Paz hospital in Madrid, the wounded are said to be suffering third-degree burns. A hospital spokesman told ABC News that there were 6 people admitted to the hospital.

Meanwhile, ambulances are continuing to arrive at that hospital and at the Ramon y Cajal hospital next door with passengers who are seriously wounded. The government's official figures claim that at least 45 people were killed in the accident. But a source from emergency services told Reuters that all but 25 of the passengers onboard the plane are feared dead. According to eyewitness reports from the Spanish newspaper website, El Pais, "The plane was all broken and bodies were everywhere."

"I have not seen something like that in my life," said Luis Ferreras, chief of one of the ambulance posts sent to the accident site. There are now 60 ambulances on this location, according to El Pais. According to initial reports, the Spanair plane skid off the runway before crashing into the buses parked on the perimeter road. El Mundo reported that one of the plane's engines may have caught fire on takeoff. Nearly two hours after it caught fire, firefighters were still attempting to extinguish the fire. Eleven fire engines have been dispatched to the scene of the accident. Flight JKK 5022 -- bound for Las Palmas in the Grand Canary Islands -- reportedly had 172 people onboard, this includes 166 passengers (including two babies) and six crew members. The BBC reports that a lot of the people onboard the aircraft were families with young children.