The Ukrainian ambassador Andriy Melnyk has to vacate his post in Germany.
President Volodymyr Zelenskyy recalled the 46-year-old diplomat on Saturday, as did the Ukrainian ambassadors in Norway, the Czech Republic, Hungary and India.
In a video message, Selenskyj spoke of a normal process in the evening.
"This issue of rotation is a common part of diplomatic practice," he said, without naming any of the five ambassadors.
It was initially unclear whether Melnyk would be scheduled for another high-ranking position in Kyiv or elsewhere after his dismissal.
Melnyk repeatedly sharply criticized the federal government
A spokeswoman for the Federal Foreign Office said on request: "The Federal Foreign Office has not yet been notified of the ambassador's dismissal."
Most recently, however, he himself came under massive criticism for statements about the Ukrainian nationalist and anti-Semite Stepan Bandera.
Zelenskyj also changed the head of the regional government in the embattled southern Ukrainian Cherson.
Sunday is the 137th day of the war for Ukraine since the start of the Russian attack at the end of February.
US promises more humanitarian aid to Ukraine
The US government pledged further humanitarian assistance to Ukraine.
US Secretary of State Antony Blinken announced Saturday after the G20 foreign ministers meeting in Bali that "the United States will provide nearly $368 million in additional humanitarian assistance to help those affected by Russia's brutal war against Ukraine “.
Since the start of the Russian invasion in February, the United States, the top donor country, has pledged more than $1.28 billion in humanitarian aid to Ukraine.
Blinken called on Russia's President Vladimir Putin to "end hostilities immediately."
Dead and injured in shelling
At least three people were killed and eight injured in Russian shelling in the eastern Ukrainian region of Donetsk on Saturday, according to Governor Pavlo Kyrylenko.
In the town of Avdiivka alone, there were more than ten attacks on residential areas and civilian infrastructure, he said.
For their part, the pro-Russian separatists accused the Ukrainian army of attacks.
Reports from the combat zones can hardly be checked independently.
Kyiv thinks about missile defense
According to Defense Minister Oleksiy Reznikov, Ukraine needs a different anti-missile system than the Israeli "Iron Dome" system.
“Even Iron Dome does not protect 100 percent.
Iron Dome was made against slow and low-flying rockets, which by nature are made in garages.
Iron Dome does not protect against cruise missiles and ballistic missiles,” Reznikov said.
Ukraine must develop an air defense system or get it from its partners.