By Jeff Richardson
BBC News, Kabul
Kabul was rocked by a huge truck bomb in August 2010
The Taliban says it will reward families of suicide bombers who “accomplish their mission”.
The suggestion in a statement sent to the BBC came after the killing of two foreigners in the city of Ghazni.
“Promotion of human rights comes first,” said the insurgents’ new spokesman Zabihullah Mujahid.
Taliban fighters have often killed civilians in their attacks against Nato targets, including the three people killed on Sunday.
The Ghazni bombing was one of the deadliest Taliban attacks on foreign military targets in recent years.
The two foreigners – an Afghan intelligence operative and a US civilian contractor – were buried by their families on Wednesday in the Kabul area.
Tens of thousands of Taliban and foreign fighters are scattered across the country and often use civilian targets as cover in their attacks.
There has been criticism of the Afghan government and the international forces for allowing children to participate in suicide attacks and for failing to act against those suspected of complicity in attacks against civilians.
On Tuesday, the Nato-led International Security Assistance Force (Isaf) announced it had fired two Afghan police officers in Ghazni for helping the Taliban to launch the Sunday suicide attack.
Meanwhile, the new head of the Afghan Police College says his forces are under significant pressure to clear out insurgents from the country’s towns and cities.
Militants, he says, are trying to win the battle of minds and hearts with an effective propaganda campaign.