Neighbour crying

We live in a flat and the person next door usually fights with his wife everyday .We hear them fighting almost everyday with even things being thrown sometimes . But it's strange today . he has been crying for more than an hour with loud sad songs playing in the background. We initially brushed it off thinking it's just some serial/ movie or maybe he is just laughing that way but later realised it is not and it has been going on for over an hour now . It's only women in our house , and the other neighbours are not interested in interfering. We are scared that he might end up doing something worse . Should we knock?

Update : we tried the Swiggy method that someone mentioned in the comment and failed cuz the main gate was locked . So we had to go unlock and get the item and the delivery partner was not willing to check. We got to know that he got into a accident and is fractured. So he is probably crying from that pain . We will still check in the morning.

Update 2: we are still waiting for him to open the door . We don't want to be creepy and keep knocking. We are planning to wait till 2pm and then knock of he still didn't open.

Update 3 : he still haven't opened the door from yesterday night . My dad is totally against me interfering in this matter . So , we gonna leave this for now . I still hope there is nothing wrong .

Update 4: His friend came over and they are having a talk . He seems to be doing fine .

Thankyou all for your suggestions.