A plane was spotted landing at Malaysia Expressway, which cause a congestion. Further update from Straits Time stated that it was a private plane flown by two Singaporean pilots.
According to The Straitstime, one of the pilot requested for a return landing to Senati International Airport (in Johor Bahru, Malaysia) at 10.40am due to technical problem. However, the air plane was not able to make the landing at the airport, and eventually landed at the highway near Sedenak.
Read more about what happen to the plane at The Stratstime.