Then spake Elisha unto the woman, whose son he had restored to life, saying, Arise, and go thou and thine household, and sojourn wheresoever thou canst sojourn: for the LORD hath called for a famine; and it shall also come upon the land seven years. 2 Kings 8.1God called for a seven year famine. The Bible doesn't say why God did this.
But I guess God can starve people to death if he wants to, for any reason, or for no reason at all.
The Bible doesn't say how many God starved to death in the seven year famine, so I'll just guess 7000, 1000 per year.
God's next killing: Jehoram of Israel