The phrase "allegedly plotting to assassinate" is correct and usable in written English.
It can be used in contexts where someone is accused of planning an assassination without confirmed evidence.
Example: "The authorities arrested several individuals who were allegedly plotting to assassinate a prominent political figure."
Alternatives: "reportedly scheming to kill" or "purportedly planning an assassination."
Shortly before the presidential election of 2002, in which Tsvangirai was a candidate, he was charged with treason for allegedly plotting to assassinate Mugabe.
And at the time of the first wave of arrests it was allegedly plotting to assassinate a number of prominent Turkish citizens, including Orhan Pamuk, the Nobel Prize-winning novelist; the Patriarch of the Greek Orthodox Church; and Erdoğan himself.
See articleIn a sign of renewed tension between the Turkish army and the government, eight special-forces soldiers were briefly arrested for allegedly plotting to assassinate a senior politician from the ruling Justice and Development (AK) party.
George Bush urged President Jose Eduardo dos Santos to seize the chance to make peace with UNITA, Savimbi's party and guerrilla force.See article: Peace prospects in AngolaMorgan Tsvangirai, Zimbabwe's opposition leader, was briefly arrested and, he said, charged with treason for allegedly plotting to assassinate President Robert Mugabe.
Documents from 1308 about the trials of the Knights Templar, who were disbanded by Pope Clement V. A letter from Mary Queen of Scots, written in 1586, a few weeks before her execution for allegedly plotting to assassinate Elizabeth I, in which she declares her allegiance to the "universal" Catholic church.
Last June, renegade Kings allegedly plotted to assassinate him.
Several of the suspects and perpetrators behind the recent series of attacks, including three men allegedly caught plotting to assassinate Israeli Foreign Minister Avigdor Lieberman with a rocket-propelled grenade, were West Bank Palestinians with ties to Hamas.
Seoul's top spy agency last year said it arrested a North Korean agent who allegedly had been plotting to assassinate Park with a poison-tipped needle.
The heroine, Wong Chia Chi Tang Weii), belongs to a university drama troupe plotting to assassinate a collaborator named Mr. Yee Tony Leungg).
