Here's another item from our news desk:

EU, Ukraine Postpone Summit Until September

The European Union says it has postponed an EU-Ukraine Summit that was scheduled for next month until September.

A European Commission spokeswoman said on April 27 that the delay was agreed to in order to give the new government in Kyiv the necessary time to carry out political and financial reforms in the country.

The summit was to have been held in Brussels on May 19 and attended by Ukrainian President Petro Poroshenko.

"In the meantime, the new Ukrainian government will pursue work on delivering its reform commitments" under the EU-Ukraine Association Agreement, the spokeswoman said.

"The rescheduling of the summit should also allow for the review of the IMF [International Monetary Fund] program to be concluded," she added.

The EU's Association Agreement with Ukraine was the main issue behind a crisis in the country that led to the 2014 ousting of pro-Moscow President Viktor Yanukovych, who rejected the deal.

Based on reporting by AFP and dpa

Good morning. Amid reports that jailed Ukrainian pilot Nadia Savchenko has received official forms needed for her to be extradited from Russia to Ukraine, it seems that there may be a further twist in the tale, according to RFE/RL's news desk:

Report: Russia Detains Savchenko's Sister At Ukrainian Border

Reuters is reporting that Russia has detained Nadia Savchenko's sister at the Ukrainian border after she visited the jailed Ukrainian pilot in prison.

The news agency said a Ukrainian diplomat was headed to the Russian border on April 28 to help Vira Savchenko, who is being held by Russian border guards after they seized her passport as she attempted to cross the border in a Ukrainian diplomatic car.

The guards told Savchenko that she was on a federal wanted list, said Yarema Dukh, press aide to Ukrainian President Petro Poroshenko.

While the guards did not say why they detained Savchenko, Russia started a criminal case against her in November for showing "disrespect" toward a Russian judge, whom she called a "schmuck."

Ukrainian Foreign Ministry spokesman Dmytro Kulebawrote wrote on Twitter that Savchenko and a Ukrainian consul locked themselves in the diplomatic car after they were detained.

Kyiv sent Vitaly Moskalenko, Ukraine's Consul General in the Russian port city of Rostov-on-Don, to the border to aid Savchenko.

The incident comes hours after news agencies reported the beginning of extradition procedures for Nadia Savchenko, who received a 22-year jail sentence on murder charges that she denies.

Based on reporting by Reuters and Ukraine Today

This ends our live blogging for April 27. Be sure to check back tomorrow for our continuing coverage.

More on the Savchenko extradition forms:

Jailed Ukrainian pilot Nadia Savchenko has received official forms needed for her to be extradited from Russia to Ukraine, her lawyer says.

Attorney Mark Feigin told Russia's RIA Novosti news agency on April 27 that Savchenko had been given the documents and that a lawyer, Nikolai Polozov, would go to Savchenko's jail in Novocherkassk on April 29 and help her fill out the forms.

Feigin added that the entire process of extradition could take many months.

"I have received Savchenko's statement [saying she agrees] to be extradited to serve her prison sentence in Ukraine...I believe that the procedure has started," RIA quoted Feigin as saying.

Savchenko was sentenced by a Russian court to 22 years in jail on March 22 after she was found guilty of involvement in the killing of two Russian journalists during fighting by Russia-backed separatists against Ukrainian forces in eastern Ukraine.

Savchenko has denied any involvement in the incident and says she was abducted and illegally brought to Russia.

Savchenko, 34, is a national hero in Ukraine and is viewed as a symbol of resistance against Russia, which forcibly seized Ukraine's Crimean Peninsula in 2014 before illegally annexing it.

Ukrainian President Petro Poroshenko says he and his Russian counterpart, Vladimir Putin, have agreed to the framework for a deal to exchange Savchenko for soldiers captured in Ukraine that Kyiv says were active Russian soldiers. (Reuters, Interfax)