A group of Kenyan Muslims travelling on a bus ambushed by Islamist gunmen protected Christian passengers by refusing to be split into groups, according to eyewitnesses.
They told the militants "to kill them together or leave them alone", a local governor have told Kenyan media.
At least two people were killed in the attack, near the north-eastern village of El Wak on the Somali border.
The Somali based al-Shabab group says it carried out the attack.
The group often carries out attacks in Kenya's north-east.
The bus was travelling from the capital Nairobi to the town of Mandera.
When al-Shabab killed 148 people in an attack on Garissa University College in April, the militants reportedly singled out Christians and shot them, while freeing many Muslims.
Last year, a bus was attacked near Mandera by al-Shabab militants, who killed 28 non-Muslims travelling to Nairobi for the Christmas holidays.
The passengers on the bus showed great bravery, but there was another quality revealed by their surprising decision to stand up to the gunmen: Frustration.
The majority of the local population in the north-east are Kenyan Muslims of Somali descent, and they have been hit hard by the consequences of al-Shabab attacks, even if non-Muslims are supposedly the main target of the Somali militant group.
An attack last year in Mandera, in which Christians were killed after being separated from Muslims, caused the departure of more than 2,000 teachers, as well as many health workers who had come from other parts of the country.
Perhaps the passengers felt that the region could simply not afford another such attack.
It will be interesting to see if their actions embolden local populations to increase their resistance to al-Shabab, which has attacked the area several times.