Questions & Answers about Terroristen er i byen.
Because Norwegian often adds the definite article to the end of the noun.
- terrorist = terrorist / a terrorist
- terroristen = the terrorist
So terroristen er i byen literally means the terrorist is in the city/town.
There is no separate word for the here, because Norwegian usually puts definiteness on the noun itself as a suffix.
- terroristen = the terrorist
- byen = the city / the town
This is a very common feature of Norwegian nouns.
For the same reason: byen is the definite form.
- by = city / town or a city / a town
- byen = the city / the town
In this sentence, i byen is a very common expression that often means in town, not necessarily inside the city in a very literal sense.