Police earlier admitted the person responsible for the attack on a Christmas market may still be on the loose.
She sent the 54-year-old man a nude picture of her child and brought sleeping tablets to drug her.
The 25-year-old is accused of belonging to an unspecified terrorist organisation.
Ten people including a Canadian tourist were killed in the attack.
Police admit failings in early stages of investigation as they say they are 'not even close' to finding killer.
The police suspect the man of having links to the occult.
Their aim was 'to convince viewers that those pictures are the outcome of the ongoing events in the city of Aleppo'.
Claims come as Russian investigators arrived in Ankara to investigate assassination of Andrey Karlov.
German police have said the 23-year-old man arrested may not be involved in the deadly incident.
Eyewitnesses recount the devastation which killed at least 12 people in the German capital.
Extremists will be quick to mark these deaths as casualties in the battle for the soul of Germany.
Cause of death remains unknown as police are still trying to identify mutilated corpse.
Alleged thieves were marched through the town by police after being accused of stealing bicycles.
The attack at a Christmas market in the German capital left 12 people dead and up to 50 injured.
The attacker shot three people near the main train station of Switzerland's financial capital.
Police suspect lorry was hijacked and intentionally driven into a crowd of people.
Corporal punishment is still legal in the state, though the Alabama Education Association has called for a ban.
Dozens of worshippers, mostly migrants from Somalia and Eritrea had gathered at the mosque for evening prayers.
Michelle Karnes claims university retaliated after she reported advances by older academic.
Glendon Scott Crawford wanted to build a radiation machine to attack Muslims and President Obama.
Victims' families say social media sites and YouTube help to support and finance Islamic State.
Burhan Ozbilici describes assassin Mert Altıntaş as 'agitated' as he murdered Andrey Karlov.
Nicola Brown, 43, was found guilty of murder and two charges of GBH against her newborn son.
An ISIS-linked group has reportedly claimed responsibility but police have not confirmed terrorism.
Locals in the Russian city unknowingly drank methanol which is a toxin found in anti-freeze.
Philip Farley, 48, even conned his child victims into taking fake 'urine tests'.
The man identified as police officer reportedly shouted 'Aleppo' and 'revenge' after gunning down Andrey Karlov.
Extent of injuries unknown as area surrounding Muslim prayer centre is cordoned off.
CCTV footage of the shocking attack made news across the world.
Detective Constable Grant McPherson was arrested at his home in August.