The sky was cloudy and foggy when a helicopter on which American basketball legend Kobe Bryant crashed, causing his death alongside his daughter and seven others on board. Weather conditions are likely to be an important aspect of aviation experts' investigations into Sunday's tragic accident near Los Angeles.

The Sikorsky S-76 helicopter landed on a hill Sunday morning outside the city of Calabasas, California, forty miles (65 km) northwest of central Los Angeles, causing fire and debris spread over an area of ​​about a quarter of an acre.

Later, the Los Angeles authorities announced that all nine passengers on board the plane were killed.

After the death of Bryant, 41, and his 13-year-old daughter Gianna, as confirmed by the NBA League, fans, athletes and politicians took the initiative to express lamentations and disbelieve what happened.

Local media reported that Bryant and the accompanying group were on the way to a sports academy near Thousand Oaks, whose daughter was receiving basketball training as a junior championship.

Investigators from the Federal Aviation Authority and the National Transportation Safety Board began arriving on the site yesterday with the aim of launching separate investigations into the accident.

Among the factors that are expected to emerge in the forefront of the causes of the accident are the weather conditions in light of the weather forecast that reported low clouds and decreased visibility rates in this area at the time of the accident. A number of eyewitnesses spoke of the intense fog in that area where the helicopter fell.

The fog was so thick in the area on Sunday morning that the Los Angeles Times and CNN satellite reported that the Los Angeles police had decided to prevent its fleet of helicopters from flying until Sunday afternoon. It is not known if the Bryant pilot was trained in automated driving techniques when visibility declined.

Bryant has been known to fly by helicopter a lot since he was a player in order to avoid the famous traffic jam in Los Angeles.

His 18-year-old star arose and played twenty years with the Los Angeles Lakers, participated in the All-Star Game 18 times, and won the NBA five times.

It is ranked fourth on the list of points scores over the ages in the NBA with 33,643 points.