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Consumer watchdog Which? has claimed that more than one billion Android phones and tablets are vulnerable to hackers as they no longer supported by security updates.

According to the research report, the most at-risk phones are any that run Android 4 or older and those smartphones running Android 7.0 which can not be updated are also at risk.

Based on data from Google analysed by Which?, two in five android device users around the world are no longer receiving the important updates. Currently, those devices are unlikely to have issues, but the lack of security leaves them open to attack.

"It is very concerning that expensive Android devices have such a short shelf life before they lose security support, leaving millions of users at risk of serious consequences if they fall victim to hackers," Kate Bevan editor Which? said in a statement.

"Google and phone manufacturers need to be upfront about security updates with clear information about how long they will last and what customers should do when they run out. The government must also push ahead with planned legislation to ensure manufacturers are far more transparent about security updates for smart devices and their impact on consumers," Kate added.

Android phone released around 2012 or earlier, including popular models like the Samsung Galaxy S3 and Sony Xperia S, are particularly at risk to hackers.

Which? has made suggestions to Android users on what to consider if they have an older phone that may be at risk.

Any Android device which is more than two years old, check whether it can be updated to a newer version of the operating system. If it is on an earlier version than Android 7.0 Nougat, try to update via Settings> System>Advanced System update.

In case a user is not able tto update the phone, the device could be at risk of being hacked if it is running a version of Android 4 or lower.

A user also need to be careful about downloading apps outside the Google Play store and should also install a mobile anti-virus via an app.

New Delhi, Jun 22: Defence Minister Rajnath Singh on Monday left for a three-day visit to Russia. Singh is likely to discuss the India-Russia defence and strategic partnership during the visit and also attend a military parade in Moscow to mark the 75th anniversary of the Soviet victory over Nazi Germany in the Second World War.

The visit comes days after the violent face-off with China in which 20 Indian Armymen were killed in Galwan valley in Ladakh.

"Leaving for Moscow on a three day visit. The visit to Russia will give me an opportunity to hold talks on ways to further deepen the India-Russia defence and strategic partnership. I shall also be attending the 75th Victory Day Parade in Moscow," the Defence Minister tweeted.

Defence Secretary Ajay Kumar is also accompanying the minister.

Chennai, Feb 20: Three people, including an assistant director were killed and 9 others injured when a crane used for the shooting of “actor Kamal Haasan starrer “Indian 2” film crashed down at Nazarathpet near Poonamallee here late on Wednesday night.

Police said the accident occurred when a group of workers were engaged in erecting a set for a scene at EVP film city, private studio. As the crane crashed down, a heavy-duty light stand that was mounted on it also fell on the workers.

Mr Haasan and the film director S.Shankar escaped unhurt in the accident.

The deceased were identified as Krishna (34), an assistant director of the film, Madhu (29) and Chandran (60), who was part of the catering team.

Tamil Nadu Fire and Rescue Services personnel, along with a fire tender from Irungattukottai rushed to the spot and retrieved the bodies from the spot.

Mr Haasan, who was at the accident spot, also helped to transport the injured people to a private hospital near Poonamallee.

The bodies were sent to the Government General Hospital for post-mortem.

The Nazarathpet police have filed a case and are investigating the cause of the accident.

Meanwhile, Mr.Haasan condoled the death of three people during the film shoot. “The accident is the most horrific I have seen in my film career. I have lost three colleagues, but my pain pales in comparison to the grief of those who have lost their loved ones.

My deepest sympathies to them, he tweeted.

The Lyca productions also expressed condolences over the tragic accident. “We are extremely saddened with the unfortunate accident happened at the sets of Indian 2. We have lost three of our most hardworking technicians, it tweeted.