The move came after Russian forces fired on, boarded and captured three of Kiev's ships on Sunday off the coast of Crimea, sparking the most unsafe crisis between the ex-Soviet neighbours in years.
"We had information that after this provocation Russian regular forces could go for more aggressive actions against Ukraine.This is why Ukraine's authorities made a decision to impose martial law", Parubiy says.
Trump added: "I don't like that aggression".
The announcement comes three days after Russian border guards fired on three Ukrainian vessels and seized them and their crews.
Later on the show, Rep. Adam Kinzinger (R-Ill.) said Trump should cancel the meeting, but if it does happen, Trump must be careful not to appear as Putin's "friend".
All of the sailors face jail terms of up to six years if found guilty of what Moscow says was a plot to illegally cross the Russian border by trying to pass through the Russian-controlled Kerch Strait on Sunday without advance notice and ignoring calls to stop.
"It was without doubt a provocation", Putin said in Moscow.
The US State Department has termed Russia's actions "a unsafe escalation" and said Washington wants to see "our European allies doing more to assist Ukraine".
The RIA Novosti news agency reported it would be in place by the end of the year, joining three other S-400 systems already on the peninsula.
Austria, which now holds the rotating European Union presidency, has said the bloc will consider further sanctions against the Kremlin at an upcoming meeting.
The Interfax news agency on Wednesday quoted Col. Vadim Astafyev, the top Defense Ministry official in Russia's south, as saying that Russian Federation will add one S-400 anti-aircraft missile system to the three already deployed in the peninsula.
Earlier Wednesday, the Russian military announced it would be boosting the defenses of the occupied Crimean peninsula with more anti-aircraft missiles in the wake of the standoff.
Western leaders have faced criticism for what some observers have said was a slow, stumbling response to the developing crisis in Kerch, with tweeted statements of condemnation and concern standing as the only western response for nearly two days.
The comments were his strongest to date in condemnation of Russia's recent actions in Ukraine, where tensions are flaring.
"Maybe I won't have the meeting".
"We don't have any other information from [U.S. officials]", he said when asked about Trump's comments.
They captured 24 Ukrainian sailors, three of whom are in the hospital and 12 of whom are sitting in pre-trial detention.