DUSAHNBE, September 21, Asia-Plus  -- Afghans gathered to mourn assassinated former president and chief peace negotiator Burhanuddin Rabbani on Wednesday, World Peace Day, as fears mounted that his death could deepen ethnic divisions and nudge the country toward civil war, Reuters reports.

Rabbani, perhaps the most prominent Afghan to be killed since the fall of the Taliban in 2001, died at his home on Tuesday when an insurgent he was due to hold talks with detonated explosives concealed in a turban.

The killing was a strong statement of Taliban opposition to peace talks and the latest in a string of high-profile assassinations to shake the confidence of ordinary Afghans that security can be maintained as foreign forces withdraw.

Rabbani was Afghanistan''s most influential ethnic Tajik and his killing is likely to exacerbate ethnic divides.  This may do more to damage peace efforts than the loss of a negotiator who had so far produced limited evidence of steps toward talks.

Hundreds gathered on Wednesday on the blocked-off street around Rabbani''s home and armored cars with blacked-out windows carried senior officials, friends and other prominent Afghans to a memorial service inside.

World Peace Day activities planned for across the capital, including a concert for women by famous Afghan singer Farhad Darya, were canceled.

Rabbani''s inner circle have chosen a hilltop overlooking Kabul''s diplomatic enclave to bury the man who made his name as a fiery lecturer and activist and then became an anti-Soviet fighter, before briefly heading the country after the fall of the Soviet-backed regime.

Students from Kabul University gathered on a street draped with black banners close to Rabbani''s home and carried signs venting their anger at the government, which they blamed for his death.

“The situation will further deteriorate because of the killings of our leaders,” said Mujeed, a 21-year-old student of political law, from Rabbani''s home province of Badakhshan.  “We have no choice but to arm ourselves and defend the country. This is a plot hatched by the government to get rid of Rabbani, because he was exposing the fact that the government wanted the Taliban to come back.”

A group of about nine students clustered around him nodded in agreement.

Ahmad Wali Masoud, a prominent politician and brother of the late resistance hero Ahmad Shah Masoud, said Rabbani''s death was a catastrophe that could change Afghanistan''s political landscape.

“Since he could not do it, I''m sure no one else can make peace with the Taliban," he told reporters. "Some people believed he could do something, but now with his death, the (hope of) peace is dead as well.”