The Madhu School bus bombing, also known as Thadchanamadhu claymore attack, was the bombing of a school bus carried out on January 29, 2008, in rebel LTTE controlled area in Thadchanamadhu in Mannar, Northern province of Sri Lanka.

This attack was the second attack on a civilian bus in the month of January in Sri Lanka[5][6][7][3] On January 2, 2008, the government of Sri Lanka officially pulled out of the cease fire signed in 2002.The area lies near the border between Sri Lankan Army and rebel LTTE controlled areas and around 22 claymore attacks had taken place earlier killing 62 people.Students were returning from Mannar Sinapandivirichchan Government Tamil Mixed School travel through this route daily.

This incident took place in the town of Mannar about 1 km from the Madhu Church which is a LTTE rebel controlled area.

[1][8] The pro-rebel Tamilnet reported that the civilian bus was hit by a claymore that was triggered by Sri Lankan Army’s deep penetration unit.

[1] The Sri Lankan Army denied any responsibility and claimed that there was no military unit operating in the area at that time.