The Prophet ﷺ said, "The Hour (Last Day) will not be established until (religious) knowledge will be taken away (by the death of religious learned men), earthquakes will be very frequent, time will pass quickly, afflictions will appear, murders will increase and money will overflow amongst you." (See Hadith No. 85 Vol 1).  

قَالَ النَّبِيُّ ﷺ لاَ تَقُومُ السَّاعَةُ حَتَّى يُقْبَضَ الْعِلْمُ وَتَكْثُرَ الزَّلاَزِلُ وَيَتَقَارَبَ الزَّمَانُ وَتَظْهَرَ الْفِتَنُ وَيَكْثُرَ الْهَرْجُ وَهْوَ الْقَتْلُ الْقَتْلُ حَتَّى يَكْثُرَ فِيكُمُ الْمَالُ فَيَفِيضُ  

[Machine] The Messenger of Allah ﷺ said, "The Hour will not be established until knowledge is taken away, time becomes closer, earthquakes become frequent, tribulations appear, and killings increase." They asked, "O Messenger of Allah, what is 'killings'?" He replied, "Killing, killing."  

قَالَ رَسُولُ اللهِ ﷺ لَا تَقُومُ السَّاعَةُ حَتَّى يُقْبَضَ الْعِلْمُ وَيَتَقَارَبَ الزَّمَانُ وَتَكْثُرَ الزَّلَازِلُ وَتَظْهَرَ الْفِتَنُ وَيَكْثُرَ الْهَرْجُ قَالُوا الْهَرْجُ أَيُّمَا هُوَ يَا رَسُولَ اللهِ؟ قَالَ الْقَتْلُ الْقَتْلُ