Moscow, Feb 24 (PTI) Here is the approximate IST timeline of the Russia-Ukraine crisis which broke out on Thursday morning after Russian President Vladimir Putin ordered a military operation against Ukraine.

4:52 am: Ukraine hit by more cyberattacks, destructive malware.

Also Read | Russia Says Ukraine's Air Defence Destroyed After Airports, Runways Across the Country Rocked by Explosions.

8:22 am: UN Secretary-General Antonio Guterres urges Russian President Vladimir Putin: 'Stop your troops from attacking Ukraine. Give peace a chance.'

8:30 am: President Putin says Russia will conduct a military operation in eastern Ukraine; warns any foreign attempt to interfere with Russian action would lead to 'consequences they have never seen'.

Also Read | 'Russia's Military Operation Is Blatant Aggression, Have Caused Civilian Casualties', Says Ukrainian Envoy to India Igor Polikha.

9:04 am: US President Joe Biden denounces "unprovoked and unjustified" attack on Ukraine, pledges world will 'hold Russia accountable".

9:19 am: India calls for immediate de-escalation, refraining from further action that worsens Russia-Ukraine crisis.

9:47 am: Explosions heard in Ukrainian cities of Odesa, Kharkiv.

10:29 am: Russian military says it has targeted Ukrainian air bases and other military assets.

10:34 am: Ukraine's president declares martial law, urges citizens to not panic as Russia launches military strikes.

11:23 am: Europe warns of airspace risks around Ukraine.

11:30 am: China urges all parties involved in the Ukraine issue to exercise restraint.

12:18 pm: Russian military says it has knocked out Ukraine's air defence assets and airbases.

12:30 pm: Special military operation aimed at ‘demilitarisation and denazification' of Ukraine: Putin

1:16 pm: EU official: European Union assessing the 'strongest, harshest package' of sanctions (against Russia) it has ever considered.

2:40 pm: Ukrainian President Volodymyr Zelensky urges world leaders to provide defence assistance, help protect Ukraine's airspace from Russia.

3:21 pm: Ukraine's president says the country has cut diplomatic ties with Russia after its attack.

3:32 pm: Adviser to Ukraine's president says about 40 people have been killed so far in the Russian attack on the count.

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)