It was an ordinary Thursday morning in Jakarta and little did commuters know, as motorcycle taxis ground through interminable traffic, that young men with guns and murder on their mind would soon be among them.
At 10:43 a small group, laden with explosives, suicide vests and firearms, walked into a Starbucks cafe and unleashed the worst. Five hours later they were all dead. The so-called Islamic State said they carried out this attack, its first in Asia.
If the killers planned mass slaughter, they did not succeed. Four civilians were left dead. But it is their ambition that is worrying.
They appeared untrained but had the worst of intentions. The attack came amid vague warnings but more significantly after a spate of pledges of allegiances to IS across the Indonesian archipelago by small groups of young men and women.
The answer to why these young Indonesians are becoming more radicalised lies in places like Solo, 400 miles (650km) away. Read more on bbc.