Common Snake In Eti-Osa Area Of Lagos: Is It Venomous Or Poisonous?

Please nairalanders i need information about this snake. The snake is very common in eti osa area of Lagos.

This is the second one that I have killed this year in my compound . There are undeveloped plot of land around my compound, I suspect that they come from there I need to know the specie, and if they are venomous and poisonous.

Thanks for anticipated assistance