Merseyside police and firefighters were called to WHSmith on Chapel Street in Southport on Sunday after an alarm was raised at around 2.10am.
In an early morning raid on WHSmith the thieves blew up an ATM machine and made off with the contents.
The thieves used an explosive device to blow up the ATM in Southport on Sunday.
Police remain on the scene today, October 25, where forensic, witness and video surveillance investigations are being conducted.
They made off with an unknown amount of cash.
Upon arrival, it was discovered that the thieves had used an explosive device to gain access to an ATM.
Photos show a police cordon in front of WHSmith and the post office.
Part of the shop window was boarded up after the raid, as was the ATM.
said Detective Inspector Tara Denn: “This is an extremely ruthless way of targeting any premises, one that puts members of the public who live, work and passed by nearby at risk of serious injury. The damage and inconvenience to the company is also considerable.
“We have already proven in successful regional and national operations that we will bring to justice those identified in such activities.
“If you saw or heard suspicious activity in and around Chapel Street around 2 a.m., or if you live nearby and have a video surveillance system or dashboard at home, please let us know. We will do everything in our power to remove these reckless people from the streets.
Anyone who has information is asked to contact us through the Social Media Desk via Twitter @MerPolCC or Facebook Merseyside Police CC with reference 20000646390.
You can also share information anonymously via the independent charity Crimestoppers on 0800 555 111 or via their online form at https://crimestoppers-uk.org/give-information/give-information.