independent.co.uk
'Two explosions' heard at Ariana Grande concert in Manchester
There are a number of confirmed deaths at Manchester Arena following a reported explosion at an Ariana Grande concert, police have said. Twitter users reported thousands of concert goers fled the arena covered in blood and crying, although it is not immediately clear what the reported "loud bangs" were. The noises were heard towards the end of the show, with witnesses claiming on social media they believed the bangs were a "gun shot" or a "bomb".
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St Petersburg attack: At least 10 dead after bombing on Russian metro

At least 10 people have been killed and 50 more injured in a bomb blast in the St Petersburg metro system after an unidentified explosive device went off on a train that was travelling between two stations.

An eyewitness said that when smoke started pouring out of the carriages, people began to flee in panic.
“People were bleeding, their hair burned,” one man told Russian channel Life News, translated into English.
“Smoke poured out of the carriages. We were told to move to the exit, because the movement stopped. People just fled. My girlfriend was in the next car that exploded. When she came out, she saw that people were mutilated.”

Aftermath Footage