A spokesman for the Pakistan armed forces, tweeted that its three soldiers had died along with five of India's when Indian forces opened fire along the contested border.
Mullah Haibatullah Akhundzada also gives no sign the Taliban will repeat last year's truce over the three-day Eid holiday.
In a joint statement, French President Emmanuel Macron and German Chancellor Angela Merkel welcomed the latest ceasefire announcement.
The Tatmadaw, the military's Myanmar name, said their soldiers in Shan state were attacked by Shan State Army (SSA) troops.
The team led by Patrick Cammaert, a retired Dutch general, made their first stop in Aden where the internationally-recognised government is based.
10 ethnic rebel groups have signed up to a peace process led by civilian leader Aung San Suu Kyi.
The Iranian-aligned Houthi group and the Saudi-backed government of Abd-Rabbu Mansour Hadi agreed to cease fighting in the Red Sea city and withdraw forces.
At least 29 fighters, including 22 Huthi rebels, have been killed in clashes and air strikes in Hodeida province.
Analysts warned the ceasefire accord's success depends on sustained international pressure.
Netanyahu has defended Tuesday's ceasefire deal that ended the worst escalation between Israel and Palestinian militants in Gaza since a 2014 war.
Seven Palestinians were killed in Gaza over the course of some 24 hours as Israeli strikes targeted militants and flattened buildings while sending fireballs and plumes of smoke into the sky.
The US secretary of state says a cessation of hostilities and resumption of a political track would help ease the humanitarian crisis.
A joint statement adopted at the end of a major summit in Istanbul said the countries were committed to working together.
Turkish President Recep Tayyip Erdogan is hosting Russia's Vladimir Putin, France's Emmanuel Macron and German Chancellor Angela Merkel for talks on the conflict in Syria.
The UN persuaded various armed groups to halt fighting that had killed dozens in Tripoli, one of the many sites of unrest gripping the oil producer.
Turkey's Tayyip Erdogan, Russia's Vladimir Putin and Iran's Hassan Rouhani agreed in a final statement that there could be no military solution to the conflict.
A Kunduz provincial council member said a total of 300 to 400 passengers could have been on the buses when they were stopped by insurgents.
Afghan President Ashraf Ghani said the conditional ceasefire will start tomorrow and it will continue as long as the Taliban preserves and respects it.
However, Israel remained on high alert and boosted its air defenses in case hostilities resume.
The rebels said the deal was brokered by Russia and would allow both fighters and civilians in opposition areas to settle their status with the government under Moscow's protection.
Taliban spokesman Zabihullah Mujahid dismissed the peace "slogans" and urged civil society activists and others not to join movements he said played into the hands of US and international forces the Taliban wants to force from the country.
Fifteen Taliban were killed in other areas of the province overnight, he said, adding that the militants prepared their attacks and did reconnaissance of the area during their ceasefire.
The Taliban had agreed to a truce but only for the first three days of Eid, which started Friday, promising not to attack Afghan soldiers or police. They would, however, continue attacking US-led NATO troops.
There was no immediate claim of responsibility for the attack. Afghanistan also faces insurgencies from Islamic State and the Taliban-linked Haqqani network.
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