How to place ありました with the 〜んです pattern, and the meaning of the resulting sentence


There is a question in Minna no Nihongo, where I need to fit in ありました with the
〜んです pattern, such that the sentence makes sense.

おそかったですね。なにか _________ か。

How shall I fit it in, and what meaning will it give to the sentence?

Thanks.




Change ありました into the plain form, あった, to be followed by んです:

> [遅]{おそ}かったですね。[何]{なに}かあったんですか。  
>  You're late. What happened?  
>  (Lit. [You] were late. Did anything happen?)




Change ありました into the plain form, あった, to be followed by んです:

> [遅]{おそ}かったですね。[何]{なに}かあったんですか。  
>  You're late. What happened?  
>  (Lit. [You] were late. Did anything happen?)

