Abu Huraira reported God’s messenger as saying, “There are five types of martyr:

one who dies of plague, one who dies of an internal complaint, one who is drowned, one who is killed by his house falling on him, and the martyr in God’s path.” (Bukhari and Muslim.)

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الشُّهَدَاءُ خَمْسَةٌ الْمَطْعُونُ وَالْمَبْطُونُ وَالْغَرِيقُ وَصَاحب الْهدم والشهيد فِي سَبِيل الله»