Children in Derry had a lucky escape after an explosion in the Brandywell area.
Damage was also caused to properties, but no-one was injured. The attack happened on the Lecky Road after 11 p.m. on Thursday night of last week.
Local Sinn Féin MLA Martina Anderson visited the scene and said she was amazed nobody was hurt in the attack and added it was unclear who or what was the target.
"There was shrapnel that went in through the window of a bedroom," she said.
"In that bedroom, thankfully, there was no one asleep at the time.
However in the adjacent window there was a two-year-old baby in a cot and had the shrapnel went through that window, that family at this moment in time are devastated thinking about what could have happened."
PSNI Chief Inspector Jon Burrows condemned the attack.
"These explosive devices, no matter how small they are, can maim and kill and we're fortunate this morning that no one was injured.
He said police were investigating what happened and added: "detectives are piecing together a timeline and trying to establish a motive."
Burrows said the bombers showed no regard for the community. "Young children getting a night's sleep before going to school and people who were last night sleeping before they had to go to work were literally put at risk.
"They will feel that trauma for the days and weeks to come so the people who leave these devices and walk into people's homes and threaten them don't care for the local community who suffer most in all of this," he said.
